**⚠️ Warning: This is a draft ⚠️**

This means it might contain formatting issues, incorrect code, conceptual problems, or other severe issues.

If you want to help to improve and eventually enable this page, please fork RosettaGit's repository and open a merge request on GitHub.

[[Category:Games]]

{{draft task|Games}}

;Task: Create a [https://en.wikipedia.org/wiki/Snakes_and_Ladders Snakes and Ladders] game where the computer plays against a human player.

This game is also known as '''Chutes and Ladders'''.

For a board example you can use this image here: [http://paulo-jorente.de/text/snakes_ledders.jpg snakes & ledders].

The way you'll represent the board and the players' tokens is totally up to you: graphics or ASCII graphics or even just text.

Happy coding.

## C

{{trans|C++}}

#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <time.h> bool sixesThrowAgain = true; void init() { srand((unsigned int)time(NULL)); } int rollDice() { return rand() % 6 + 1; } int nextSquare(int square) { switch (square) { case 4: return 14; case 9: return 31; case 17: return 7; case 20: return 38; case 28: return 84; case 40: return 59; case 51: return 67; case 54: return 34; case 62: return 19; case 63: return 81; case 64: return 60; case 71: return 91; case 87: return 24; case 93: return 73; case 95: return 75; case 99: return 78; default: return square; } } int turn(int player, int square) { int roll, next; while (true) { roll = rollDice(); printf("Player %d, on square %d, rolls a %d", player, square, roll); if (square + roll > 100) { printf(" but cannot move.\n"); } else { square += roll; printf(" and moves to square %d\n", square); if (square == 100) return 100; next = nextSquare(square); if (square < next) { printf("Yay! Landed on a ladder. Climb up to %d.\n", next); square = next; } else if (next < square) { printf("Oops! landed on a snake. Slither down to %d.\n", next); square = next; } } if (roll < 6 || !sixesThrowAgain) return square; printf("Rolled a 6 so roll again.\n"); } } int main() { int players[3] = { 1, 1, 1 }; int i, ns; init(); while (true) { for (i = 0; i < sizeof(players) / sizeof(int); ++i) { ns = turn(i + 1, players[i]); if (ns == 100) { printf("Player %d wins!\n", i + 1); goto out; } players[i] = ns; printf("\n"); } } out: return 0; }

## C++

{{trans|C#}}

#include <iostream> #include <map> #include <random> std::default_random_engine generator; std::uniform_int_distribution<int> dice(1, 6); int rollDice() { return dice(generator); } const bool sixesThrowAgain = true; const std::map<int, int> snl{ {4, 14}, {9, 31}, {17, 7}, {20, 38}, {28, 84}, {40, 59}, {51, 67}, {54, 34}, {62, 19}, {63, 81}, {64, 60}, {71, 91}, {87, 24}, {93, 73}, {95, 75}, {99, 78}, }; // taken from https://stackoverflow.com/a/2333816 template <template<class, class, class...> class C, typename K, typename V, typename... Args> V GetWithDef(const C<K, V, Args...>& m, K const& key, const V & defval) { typename C<K, V, Args...>::const_iterator it = m.find(key); if (it == m.end()) return defval; return it->second; } int turn(int player, int square) { while (true) { int roll = rollDice(); printf("Player %d, on square %d, rolls a %d", player, square, roll); if (square + roll > 100) { printf(" but cannot move.\n"); } else { square += roll; printf(" and moves to square %d\n", square); if (square == 100) return 100; int next = GetWithDef(snl, square, square); if (square < next) { printf("Yay! Landed on a ladder. Climb up to %d.\n", next); square = next; } else if (next < square) { printf("Oops! landed on a snake. Slither down to %d.\n", next); square = next; } } if (roll < 6 || !sixesThrowAgain)return square; printf("Rolled a 6 so roll again.\n"); } } int main() { // three players starting on square one int players[] = { 1, 1, 1 }; while (true) { for (int i = 0; i < sizeof(players) / sizeof(int); ++i) { int ns = turn(i + 1, players[i]); if (ns == 100) { printf("Player %d wins!\n", i + 1); goto out; } players[i] = ns; printf("\n"); } } out: return 0; }

## C#

{{trans|Kotlin}}

using System; using System.Collections.Generic; namespace SnakeAndLadder { class Program { private static Dictionary<int, int> snl = new Dictionary<int, int>() { {4, 14}, {9, 31}, {17, 7}, {20, 38}, {28, 84}, {40, 59}, {51, 67}, {54, 34}, {62, 19}, {63, 81}, {64, 60}, {71, 91}, {87, 24}, {93, 73}, {95, 75}, {99, 78}, }; private static Random rand = new Random(); private const bool sixesThrowAgain = true; static int Turn(int player, int square) { while (true) { int roll = rand.Next(1, 6); Console.Write("Player {0}, on square {0}, rolls a {0}", player, square, roll); if (square + roll > 100) { Console.WriteLine(" but cannot move."); } else { square += roll; Console.WriteLine(" and moves to square {0}", square); if (square == 100) return 100; int next = square; if (snl.ContainsKey(square)) { next = snl[square]; } if (square < next) { Console.WriteLine("Yay! Landed on a ladder. Climb up to {0}.", next); if (next == 100) return 100; square = next; } else if (square > next) { Console.WriteLine("Oops! Landed on a snake. Slither down to {0}.", next); } } if (roll < 6 || !sixesThrowAgain) return square; Console.WriteLine("Rolled a 6 so roll again."); } } static void Main(string[] args) { // three players atarting on square one int[] players = { 1, 1, 1 }; while (true) { for (int i = 0; i < players.Length; i++) { int ns = Turn(i + 1, players[i]); if (ns == 100) { Console.WriteLine("Player {0} wins!", i + 1); return; } players[i] = ns; Console.WriteLine(); } } } } }

## D

{{trans|Perl 6}}

import std.stdio; //Board layout, start square to end square auto snl() { // Workaround for not being able to static initialize an AA int[int] temp; temp[4] = 14; temp[9] = 31; temp[17] = 7; temp[20] = 38; temp[28] = 84; temp[40] = 59; temp[51] = 67; temp[54] = 34; temp[62] = 19; temp[63] = 81; temp[64] = 60; temp[71] = 91; temp[87] = 24; temp[93] = 73; temp[95] = 75; temp[99] = 78; return temp; } int turn(int player, int square) { import std.random; auto roll = uniform!"[]"(1, 6); write("Player ", player, " on square ", square, " rolls a ", roll); if (square + roll > 100) { writeln(" but cannot move. Next players turn."); return square; } else { square += roll; writeln(" and moves to square ", square); } auto next = snl().get(square, square); if (square < next) { writeln("Yay! Landed on a ladder. Climb up to ", next); } else if (square > next) { writeln("Oops! Landed on a snake. Slither down to ", next); } return next; } void main() { // three players starting on square one auto players = [1, 1, 1]; while(true) { foreach(i,s; players) { auto ns = turn(i+1, s); if (ns == 100) { writeln("Player ", i+1, " wins!"); return; } players[i] = ns; writeln; } } }

{{out}}

```
Player 1 on square 1 rolls a 5 and moves to square 6
Player 2 on square 1 rolls a 6 and moves to square 7
Player 3 on square 1 rolls a 5 and moves to square 6
Player 1 on square 6 rolls a 6 and moves to square 12
Player 2 on square 7 rolls a 4 and moves to square 11
Player 3 on square 6 rolls a 3 and moves to square 9
Yay! Landed on a ladder. Climb up to 31
Player 1 on square 12 rolls a 1 and moves to square 13
Player 2 on square 11 rolls a 1 and moves to square 12
Player 3 on square 31 rolls a 1 and moves to square 32
Player 1 on square 13 rolls a 5 and moves to square 18
Player 2 on square 12 rolls a 5 and moves to square 17
Oops! Landed on a snake. Slither down to 7
Player 3 on square 32 rolls a 5 and moves to square 37
Player 1 on square 18 rolls a 3 and moves to square 21
Player 2 on square 7 rolls a 2 and moves to square 9
Yay! Landed on a ladder. Climb up to 31
Player 3 on square 37 rolls a 3 and moves to square 40
Yay! Landed on a ladder. Climb up to 59
Player 1 on square 21 rolls a 3 and moves to square 24
Player 2 on square 31 rolls a 2 and moves to square 33
Player 3 on square 59 rolls a 5 and moves to square 64
Oops! Landed on a snake. Slither down to 60
Player 1 on square 24 rolls a 3 and moves to square 27
Player 2 on square 33 rolls a 5 and moves to square 38
Player 3 on square 60 rolls a 1 and moves to square 61
Player 1 on square 27 rolls a 6 and moves to square 33
Player 2 on square 38 rolls a 3 and moves to square 41
Player 3 on square 61 rolls a 3 and moves to square 64
Oops! Landed on a snake. Slither down to 60
Player 1 on square 33 rolls a 3 and moves to square 36
Player 2 on square 41 rolls a 1 and moves to square 42
Player 3 on square 60 rolls a 4 and moves to square 64
Oops! Landed on a snake. Slither down to 60
Player 1 on square 36 rolls a 2 and moves to square 38
Player 2 on square 42 rolls a 2 and moves to square 44
Player 3 on square 60 rolls a 4 and moves to square 64
Oops! Landed on a snake. Slither down to 60
Player 1 on square 38 rolls a 5 and moves to square 43
Player 2 on square 44 rolls a 6 and moves to square 50
Player 3 on square 60 rolls a 5 and moves to square 65
Player 1 on square 43 rolls a 2 and moves to square 45
Player 2 on square 50 rolls a 3 and moves to square 53
Player 3 on square 65 rolls a 4 and moves to square 69
Player 1 on square 45 rolls a 1 and moves to square 46
Player 2 on square 53 rolls a 4 and moves to square 57
Player 3 on square 69 rolls a 4 and moves to square 73
Player 1 on square 46 rolls a 3 and moves to square 49
Player 2 on square 57 rolls a 6 and moves to square 63
Yay! Landed on a ladder. Climb up to 81
Player 3 on square 73 rolls a 1 and moves to square 74
Player 1 on square 49 rolls a 2 and moves to square 51
Yay! Landed on a ladder. Climb up to 67
Player 2 on square 81 rolls a 4 and moves to square 85
Player 3 on square 74 rolls a 4 and moves to square 78
Player 1 on square 67 rolls a 3 and moves to square 70
Player 2 on square 85 rolls a 4 and moves to square 89
Player 3 on square 78 rolls a 4 and moves to square 82
Player 1 on square 70 rolls a 3 and moves to square 73
Player 2 on square 89 rolls a 3 and moves to square 92
Player 3 on square 82 rolls a 3 and moves to square 85
Player 1 on square 73 rolls a 3 and moves to square 76
Player 2 on square 92 rolls a 2 and moves to square 94
Player 3 on square 85 rolls a 5 and moves to square 90
Player 1 on square 76 rolls a 4 and moves to square 80
Player 2 on square 94 rolls a 6 and moves to square 100
Player 2 wins!
```

## Go

{{trans|Kotlin}}

package main import ( "fmt" "math/rand" "time" ) var snl = map[int]int{ 4: 14, 9: 31, 17: 7, 20: 38, 28: 84, 40: 59, 51: 67, 54: 34, 62: 19, 63: 81, 64: 60, 71: 91, 87: 24, 93: 73, 95: 75, 99: 78, } const sixThrowsAgain = true func turn(player, square int) int { for { roll := 1 + rand.Intn(6) fmt.Printf("Player %d, on square %d, rolls a %d", player, square, roll) if square+roll > 100 { fmt.Println(" but cannot move.") } else { square += roll fmt.Printf(" and moves to square %d.\n", square) if square == 100 { return 100 } next, ok := snl[square] if !ok { next = square } if square < next { fmt.Printf("Yay! Landed on a ladder. Climb up to %d.\n", next) if next == 100 { return 100 } square = next } else if square > next { fmt.Printf("Oops! Landed on a snake. Slither down to %d.\n", next) square = next } } if roll < 6 || !sixThrowsAgain { return square } fmt.Println("Rolled a 6 so roll again.") } } func main() { rand.Seed(time.Now().UnixNano()) // three players starting on square one players := [3]int{1, 1, 1} for { for i, s := range players { ns := turn(i+1, s) if ns == 100 { fmt.Println("Player", i+1, "wins!") return } players[i] = ns fmt.Println() } } }

Sample game:

```
Player 1, on square 1, rolls a 3 and moves to square 4.
Yay! Landed on a ladder. Climb up to 14.
Player 2, on square 1, rolls a 2 and moves to square 3.
Player 3, on square 1, rolls a 3 and moves to square 4.
Yay! Landed on a ladder. Climb up to 14.
Player 1, on square 14, rolls a 5 and moves to square 19.
Player 2, on square 3, rolls a 2 and moves to square 5.
Player 3, on square 14, rolls a 4 and moves to square 18.
Player 1, on square 19, rolls a 5 and moves to square 24.
Player 2, on square 5, rolls a 1 and moves to square 6.
Player 3, on square 18, rolls a 3 and moves to square 21.
Player 1, on square 24, rolls a 1 and moves to square 25.
Player 2, on square 6, rolls a 4 and moves to square 10.
Player 3, on square 21, rolls a 6 and moves to square 27.
Rolled a 6 so roll again.
Player 3, on square 27, rolls a 6 and moves to square 33.
Rolled a 6 so roll again.
Player 3, on square 33, rolls a 4 and moves to square 37.
Player 1, on square 25, rolls a 5 and moves to square 30.
Player 2, on square 10, rolls a 4 and moves to square 14.
Player 3, on square 37, rolls a 5 and moves to square 42.
Player 1, on square 30, rolls a 5 and moves to square 35.
Player 2, on square 14, rolls a 3 and moves to square 17.
Oops! Landed on a snake. Slither down to 7.
Player 3, on square 42, rolls a 5 and moves to square 47.
Player 1, on square 35, rolls a 5 and moves to square 40.
Yay! Landed on a ladder. Climb up to 59.
Player 2, on square 7, rolls a 5 and moves to square 12.
Player 3, on square 47, rolls a 6 and moves to square 53.
Rolled a 6 so roll again.
Player 3, on square 53, rolls a 6 and moves to square 59.
Rolled a 6 so roll again.
Player 3, on square 59, rolls a 3 and moves to square 62.
Oops! Landed on a snake. Slither down to 19.
Player 1, on square 59, rolls a 2 and moves to square 61.
Player 2, on square 12, rolls a 4 and moves to square 16.
Player 3, on square 19, rolls a 6 and moves to square 25.
Rolled a 6 so roll again.
Player 3, on square 25, rolls a 4 and moves to square 29.
Player 1, on square 61, rolls a 2 and moves to square 63.
Yay! Landed on a ladder. Climb up to 81.
Player 2, on square 16, rolls a 5 and moves to square 21.
Player 3, on square 29, rolls a 3 and moves to square 32.
Player 1, on square 81, rolls a 5 and moves to square 86.
Player 2, on square 21, rolls a 3 and moves to square 24.
Player 3, on square 32, rolls a 4 and moves to square 36.
Player 1, on square 86, rolls a 4 and moves to square 90.
Player 2, on square 24, rolls a 6 and moves to square 30.
Rolled a 6 so roll again.
Player 2, on square 30, rolls a 3 and moves to square 33.
Player 3, on square 36, rolls a 1 and moves to square 37.
Player 1, on square 90, rolls a 5 and moves to square 95.
Oops! Landed on a snake. Slither down to 75.
Player 2, on square 33, rolls a 1 and moves to square 34.
Player 3, on square 37, rolls a 3 and moves to square 40.
Yay! Landed on a ladder. Climb up to 59.
Player 1, on square 75, rolls a 5 and moves to square 80.
Player 2, on square 34, rolls a 5 and moves to square 39.
Player 3, on square 59, rolls a 3 and moves to square 62.
Oops! Landed on a snake. Slither down to 19.
Player 1, on square 80, rolls a 4 and moves to square 84.
Player 2, on square 39, rolls a 3 and moves to square 42.
Player 3, on square 19, rolls a 1 and moves to square 20.
Yay! Landed on a ladder. Climb up to 38.
Player 1, on square 84, rolls a 5 and moves to square 89.
Player 2, on square 42, rolls a 2 and moves to square 44.
Player 3, on square 38, rolls a 1 and moves to square 39.
Player 1, on square 89, rolls a 4 and moves to square 93.
Oops! Landed on a snake. Slither down to 73.
Player 2, on square 44, rolls a 4 and moves to square 48.
Player 3, on square 39, rolls a 1 and moves to square 40.
Yay! Landed on a ladder. Climb up to 59.
Player 1, on square 73, rolls a 3 and moves to square 76.
Player 2, on square 48, rolls a 2 and moves to square 50.
Player 3, on square 59, rolls a 1 and moves to square 60.
Player 1, on square 76, rolls a 2 and moves to square 78.
Player 2, on square 50, rolls a 2 and moves to square 52.
Player 3, on square 60, rolls a 4 and moves to square 64.
Oops! Landed on a snake. Slither down to 60.
Player 1, on square 78, rolls a 5 and moves to square 83.
Player 2, on square 52, rolls a 2 and moves to square 54.
Oops! Landed on a snake. Slither down to 34.
Player 3, on square 60, rolls a 4 and moves to square 64.
Oops! Landed on a snake. Slither down to 60.
Player 1, on square 83, rolls a 1 and moves to square 84.
Player 2, on square 34, rolls a 2 and moves to square 36.
Player 3, on square 60, rolls a 3 and moves to square 63.
Yay! Landed on a ladder. Climb up to 81.
Player 1, on square 84, rolls a 1 and moves to square 85.
Player 2, on square 36, rolls a 4 and moves to square 40.
Yay! Landed on a ladder. Climb up to 59.
Player 3, on square 81, rolls a 5 and moves to square 86.
Player 1, on square 85, rolls a 5 and moves to square 90.
Player 2, on square 59, rolls a 4 and moves to square 63.
Yay! Landed on a ladder. Climb up to 81.
Player 3, on square 86, rolls a 3 and moves to square 89.
Player 1, on square 90, rolls a 2 and moves to square 92.
Player 2, on square 81, rolls a 3 and moves to square 84.
Player 3, on square 89, rolls a 2 and moves to square 91.
Player 1, on square 92, rolls a 3 and moves to square 95.
Oops! Landed on a snake. Slither down to 75.
Player 2, on square 84, rolls a 2 and moves to square 86.
Player 3, on square 91, rolls a 6 and moves to square 97.
Rolled a 6 so roll again.
Player 3, on square 97, rolls a 3 and moves to square 100.
Player 3 wins!
```

## J

'''Solution'''

As discussed in other implementations, this game is purely determined by chance and no user input is actually required.

The following game starts with players' counters off the board, an exact roll is not required to win and no additional dice roll results from throwing a six.

```
require 'format/printf general/misc/prompt'
SnakesLadders=: _2 ]\ 4 14 9 31 17 7 20 38 28 84 40 59 51 67 54 34 62 19 63 81 64 60 71 91 87 24 93 73 95 75 99 78
'idx val'=: |: SnakesLadders
Board=: val idx} i. >: 100 NB. representation of the board
rollDice=: 1 + $ ?@$ 6: NB. roll dice once for each player
playTurn=: Board {~ 100 <. rollDice + ] NB. returns list of new posisitions given a list of starting positions
NB. Given the number of players, runs until one player reaches 100
runGame=: [: playTurn^:(100 -.@e. ])^:(<_) $&0
NB. Report player positions after each turn and result
report=: ('Player %d won!' sprintf 100 >:@i.~ {:) , echo
start=: >:@".@prompt&'How many players to play against?' [ echo bind 'You are Player 1!'
playSnakesLadders=: [: report@runGame start
```

'''Example Usage:'''

```
playSnakesLadders''
You are Player 1!
How many players to play against?
4
0 0 0 0 0
5 5 5 5 6
7 31 11 8 8
13 35 16 14 10
14 36 7 18 11
38 42 31 21 14
39 46 35 25 15
41 48 37 84 7
42 34 41 90 8
47 39 43 96 31
50 59 48 78 37
56 60 34 81 39
59 61 39 84 41
60 67 43 88 44
60 73 44 94 45
61 79 50 100 49
Player 4 won!
```

## Java

import java.util.Map; import java.util.Random; public class Game { private static final Map<Integer, Integer> snl = Map.ofEntries( Map.entry(4, 14), Map.entry(9, 31), Map.entry(17, 7), Map.entry(20, 38), Map.entry(28, 84), Map.entry(40, 59), Map.entry(51, 67), Map.entry(54, 34), Map.entry(62, 19), Map.entry(63, 81), Map.entry(64, 60), Map.entry(71, 91), Map.entry(87, 24), Map.entry(93, 73), Map.entry(95, 75), Map.entry(99, 78) ); private static final boolean sixesThrowAgain = true; private static Random rand = new Random(); private static int turn(int player, int square) { int square2 = square; while (true) { int roll = rand.nextInt(6) + 1; System.out.printf("Player %d, on square %d, rolls a %d", player, square2, roll); if (square2 + roll > 100) { System.out.println(" but cannot move."); } else { square2 += roll; System.out.printf(" and moves to square %d\n", square2); if (square2 == 100) return 100; Integer next = snl.getOrDefault(square2, square2); if (square2 < next) { System.out.printf("Yay! Landed on a ladder. Climb up to %d.\n", next); if (next == 100) return 100; square2 = next; } else if (square2 > next) { System.out.printf("Oops! Landed on a snake. Slither down to %d.\n", next); square2 = next; } } if (roll < 6 || !sixesThrowAgain) return square2; System.out.println("Rolled a 6 so roll again."); } } public static void main(String[] args) { // three players starting on square one int[] players = {1, 1, 1}; while (true) { for (int i = 0; i < players.length; ++i) { int ns = turn(i + 1, players[i]); if (ns == 100) { System.out.printf("Player %d wins!\n", i + 1); return; } players[i] = ns; System.out.println(); } } } }

## Kotlin

{{trans|D}}

This includes an option for the player to automatically roll again when a six is rolled which I believe is a common variation:

// version 1.2.0 import java.util.Random val rand = Random() val snl = mapOf( 4 to 14, 9 to 31, 17 to 7, 20 to 38, 28 to 84, 40 to 59, 51 to 67, 54 to 34, 62 to 19, 63 to 81, 64 to 60, 71 to 91, 87 to 24, 93 to 73, 95 to 75, 99 to 78 ) val sixThrowsAgain = true fun turn(player: Int, square: Int): Int { var square2 = square while (true) { val roll = 1 + rand.nextInt(6) print("Player $player, on square $square2, rolls a $roll") if (square2 + roll > 100) { println(" but cannot move.") } else { square2 += roll println(" and moves to square $square2.") if (square2 == 100) return 100 val next = snl.getOrDefault(square2, square2) if (square2 < next) { println("Yay! Landed on a ladder. Climb up to $next.") if (next == 100) return 100 square2 = next } else if (square2 > next) { println("Oops! Landed on a snake. Slither down to $next.") square2 = next } } if (roll < 6 || !sixThrowsAgain) return square2 println("Rolled a 6 so roll again.") } } fun main(args: Array<String>) { // three players starting on square one val players = intArrayOf(1, 1, 1) while (true) { for ((i, s) in players.withIndex()) { val ns = turn(i + 1, s) if (ns == 100) { println("Player ${i+1} wins!") return } players[i] = ns println() } } }

Sample output:

```
Player 1, on square 1, rolls a 1 and moves to square 2.
Player 2, on square 1, rolls a 3 and moves to square 4.
Yay! Landed on a ladder. Climb up to 14.
Player 3, on square 1, rolls a 6 and moves to square 7.
Rolled a 6 so roll again.
Player 3, on square 7, rolls a 3 and moves to square 10.
Player 1, on square 2, rolls a 5 and moves to square 7.
Player 2, on square 14, rolls a 4 and moves to square 18.
Player 3, on square 10, rolls a 5 and moves to square 15.
Player 1, on square 7, rolls a 3 and moves to square 10.
Player 2, on square 18, rolls a 1 and moves to square 19.
Player 3, on square 15, rolls a 1 and moves to square 16.
Player 1, on square 10, rolls a 2 and moves to square 12.
Player 2, on square 19, rolls a 5 and moves to square 24.
Player 3, on square 16, rolls a 2 and moves to square 18.
Player 1, on square 12, rolls a 2 and moves to square 14.
Player 2, on square 24, rolls a 6 and moves to square 30.
Rolled a 6 so roll again.
Player 2, on square 30, rolls a 2 and moves to square 32.
Player 3, on square 18, rolls a 1 and moves to square 19.
Player 1, on square 14, rolls a 6 and moves to square 20.
Yay! Landed on a ladder. Climb up to 38.
Rolled a 6 so roll again.
Player 1, on square 38, rolls a 3 and moves to square 41.
Player 2, on square 32, rolls a 4 and moves to square 36.
Player 3, on square 19, rolls a 6 and moves to square 25.
Rolled a 6 so roll again.
Player 3, on square 25, rolls a 3 and moves to square 28.
Yay! Landed on a ladder. Climb up to 84.
Player 1, on square 41, rolls a 4 and moves to square 45.
Player 2, on square 36, rolls a 6 and moves to square 42.
Rolled a 6 so roll again.
Player 2, on square 42, rolls a 3 and moves to square 45.
Player 3, on square 84, rolls a 1 and moves to square 85.
Player 1, on square 45, rolls a 1 and moves to square 46.
Player 2, on square 45, rolls a 1 and moves to square 46.
Player 3, on square 85, rolls a 5 and moves to square 90.
Player 1, on square 46, rolls a 1 and moves to square 47.
Player 2, on square 46, rolls a 5 and moves to square 51.
Yay! Landed on a ladder. Climb up to 67.
Player 3, on square 90, rolls a 4 and moves to square 94.
Player 1, on square 47, rolls a 4 and moves to square 51.
Yay! Landed on a ladder. Climb up to 67.
Player 2, on square 67, rolls a 1 and moves to square 68.
Player 3, on square 94, rolls a 4 and moves to square 98.
Player 1, on square 67, rolls a 5 and moves to square 72.
Player 2, on square 68, rolls a 3 and moves to square 71.
Yay! Landed on a ladder. Climb up to 91.
Player 3, on square 98, rolls a 3 but cannot move.
Player 1, on square 72, rolls a 1 and moves to square 73.
Player 2, on square 91, rolls a 4 and moves to square 95.
Oops! Landed on a snake. Slither down to 75.
Player 3, on square 98, rolls a 6 but cannot move.
Rolled a 6 so roll again.
Player 3, on square 98, rolls a 6 but cannot move.
Rolled a 6 so roll again.
Player 3, on square 98, rolls a 2 and moves to square 100.
Player 3 wins!
```

=={{header|Modula-2}}==

```
MODULE SnakeAndLadder;
FROM FormatString IMPORT FormatString;
FROM RandomNumbers IMPORT Random;
FROM Terminal IMPORT WriteString,WriteLn,ReadChar;
CONST SIXES_THROW_AGAIN = TRUE;
PROCEDURE NextSquare(sq : CARDINAL) : CARDINAL;
BEGIN
(* Emulate a map for the ladders and snakes *)
IF sq = 4 THEN RETURN 14
ELSIF sq = 9 THEN RETURN 31
ELSIF sq = 17 THEN RETURN 7
ELSIF sq = 20 THEN RETURN 38
ELSIF sq = 28 THEN RETURN 84
ELSIF sq = 40 THEN RETURN 59
ELSIF sq = 51 THEN RETURN 67
ELSIF sq = 54 THEN RETURN 34
ELSIF sq = 62 THEN RETURN 19
ELSIF sq = 63 THEN RETURN 81
ELSIF sq = 64 THEN RETURN 60
ELSIF sq = 71 THEN RETURN 91
ELSIF sq = 87 THEN RETURN 24
ELSIF sq = 93 THEN RETURN 73
ELSIF sq = 95 THEN RETURN 75
ELSIF sq = 99 THEN RETURN 78
END;
(* No snakes or ladders encountered *)
RETURN sq
END NextSquare;
PROCEDURE Turn(player,square : CARDINAL) : CARDINAL;
VAR
buf : ARRAY[0..63] OF CHAR;
roll,next : CARDINAL;
BEGIN
LOOP
roll := Random(1,6);
FormatString("Player %c, on square %c, rolls a %c", buf, player, square, roll);
WriteString(buf);
IF square + roll > 100 THEN
WriteString(" but cannot move.");
WriteLn
ELSE
square := square + roll;
FormatString(" and moves to square %c\n", buf, square);
WriteString(buf);
IF square = 100 THEN RETURN 100 END;
next := NextSquare(square);
IF square < next THEN
FormatString("Yay! Landed on a ladder. Climb up to %c.\n", buf, next);
WriteString(buf);
IF next = 100 THEN RETURN 100 END;
square := next
ELSIF square > next THEN
FormatString("Oops! Landed on a snake. Slither down to %c.\n", buf, next);
WriteString(buf);
IF next = 100 THEN RETURN 100 END;
square := next
END
END;
IF (roll < 6) OR NOT SIXES_THROW_AGAIN THEN RETURN square END;
WriteString("Rolled a 6 so roll again.");
WriteLn
END;
RETURN square
END Turn;
(* Main *)
VAR
buf : ARRAY[0..31] OF CHAR;
players : ARRAY[0..2] OF CARDINAL;
i,ns : CARDINAL;
BEGIN
(* Initialize *)
FOR i:=0 TO HIGH(players) DO
players[i] := 1
END;
(* Game play *)
LOOP
FOR i:=0 TO HIGH(players) DO
ns := Turn(i+1, players[i]);
IF ns = 100 THEN
FormatString("Player %c wins!\n", buf, i+1);
WriteString(buf);
EXIT
END;
players[i] := ns;
WriteLn
END
END;
ReadChar
END SnakeAndLadder.
```

## Perl

{{trans|Perl 6}}

# board layout my %snl =( 4, 14, 9, 31, 17, 7, 20, 38, 28, 84, 40, 59, 51, 67, 54, 34, 62, 19, 63, 81, 64, 60, 71, 91, 87, 24, 93, 73, 95, 75, 99, 78); @players = (1, 1, 1, 1); # 4 players, starting on square 1 (last player is human) while () { for $player (0..$#players) { $turn_count++; turn(\$players[$player], $player + 1, $turn_count); } } sub turn { my($square, $player) = @_; if ($player == @players) { print "You are on square $$square. Hit enter to roll the die:"; <> } my $roll = 1 + int rand 6; my $turn = $$square + $roll; print "Player $player on square %2d rolls a $roll", $$square; if ($turn > 100) { print " but cannot move. Next players turn.\n"; return } if ($snl{$turn}) { $$square = $snl{$turn}; if ($turn > $$square) { print ". Oops! Landed on a snake. Slither down to $$square.\n" } else { print ". Yay! Landed on a ladder. Climb up to $$square.\n" } } else { $$square = $turn; print " and moves to square $$square\n"; } if ($$square == 100) {print "Player $player wins after $turn_count turns.\n"; exit } return }

{{out}}

```
Player 1 on square 1 rolls a 3. Yay! Landed on a ladder. Climb up to 14.
Player 2 on square 1 rolls a 1 and moves to square 2
Player 3 on square 1 rolls a 5 and moves to square 6
Player 4 on square 1 rolls a 4 and moves to square 5
Player 1 on square 14 rolls a 6. Yay! Landed on a ladder. Climb up to 38.
Player 2 on square 2 rolls a 2. Yay! Landed on a ladder. Climb up to 14.
Player 3 on square 6 rolls a 4 and moves to square 10
Player 4 on square 5 rolls a 3 and moves to square 8
... 703 turns omitted ...
Player 1 on square 83 rolls a 1 and moves to square 84
Player 2 on square 98 rolls a 2 and moves to square 100
Player 2 wins after 706 turns.
```

## Perl 6

{{works with|Rakudo|2017.01}} Snakes and ladders is entirely chance based, so human interaction is not really required. This version allows up to one human player against any number of computer players and asks for input... but doesn't really ''need'' or even ''use'' it. I didn't bother to implement a graphical interface.

```
# board layout
my %snl = 4, 14, 9, 31, 17, 7, 20, 38, 28, 84, 40, 59, 51, 67, 54, 34,
62, 19, 63, 81, 64, 60, 71, 91, 87, 24, 93, 73, 95, 75, 99, 78;
my @players = 1, 1, 1; # three players, starting on square 1
my $human = 1; # player 1 is human. set to 0 for all computer players
loop {
for ^@players -> $player {
turn(@players[$player], $player + 1);
}
say '';
}
sub turn ($square is rw, $player) {
if $player == $human {
prompt "You are on square $square. Hit enter to roll the die.";
}
my $roll = (1..6).roll;
my $turn = $square + $roll;
printf "Player $player on square %2d rolls a $roll", $square;
if $turn > 100 {
say " but cannot move. Next players turn.";
return $square;
}
if %snl{$turn} {
$square = %snl{$turn};
if $turn > $square {
say ". Oops! Landed on a snake. Slither down to $square."
} else {
say ". Yay! Landed on a ladder. Climb up to $square."
}
} else {
$square = $turn;
say " and moves to square $square";
}
say "Player $player wins!" and exit if $square == 100;
return $square;
}
```

{{out|Sample output}}

```
You are on square 1. Hit enter to roll the die.
Player 1 on square 1 rolls a 1 and moves to square 2
Player 2 on square 1 rolls a 4 and moves to square 5
Player 3 on square 1 rolls a 1 and moves to square 2
You are on square 2. Hit enter to roll the die.
Player 1 on square 2 rolls a 1 and moves to square 3
Player 2 on square 5 rolls a 2 and moves to square 7
Player 3 on square 2 rolls a 3 and moves to square 5
You are on square 3. Hit enter to roll the die.
Player 1 on square 3 rolls a 4 and moves to square 7
Player 2 on square 7 rolls a 1 and moves to square 8
Player 3 on square 5 rolls a 2 and moves to square 7
You are on square 7. Hit enter to roll the die.
Player 1 on square 7 rolls a 2. Yay! Landed on a ladder. Climb up to 31.
Player 2 on square 8 rolls a 3 and moves to square 11
Player 3 on square 7 rolls a 2. Yay! Landed on a ladder. Climb up to 31.
... about 15 turns omitted ...
You are on square 90. Hit enter to roll the die.
Player 1 on square 90 rolls a 3. Oops! Landed on a snake. Slither down to 73.
Player 2 on square 55 rolls a 3 and moves to square 58
Player 3 on square 90 rolls a 4 and moves to square 94
You are on square 73. Hit enter to roll the die.
Player 1 on square 73 rolls a 6 and moves to square 79
Player 2 on square 58 rolls a 5. Yay! Landed on a ladder. Climb up to 81.
Player 3 on square 94 rolls a 3 and moves to square 97
You are on square 79. Hit enter to roll the die.
Player 1 on square 79 rolls a 3 and moves to square 82
Player 2 on square 81 rolls a 6. Oops! Landed on a snake. Slither down to 24.
Player 3 on square 97 rolls a 5 but cannot move. Next players turn.
You are on square 82. Hit enter to roll the die.
Player 1 on square 82 rolls a 5. Oops! Landed on a snake. Slither down to 24.
Player 2 on square 24 rolls a 6 and moves to square 30
Player 3 on square 97 rolls a 4 but cannot move. Next players turn.
You are on square 24. Hit enter to roll the die.
Player 1 on square 24 rolls a 4. Yay! Landed on a ladder. Climb up to 84.
Player 2 on square 30 rolls a 5 and moves to square 35
Player 3 on square 97 rolls a 4 but cannot move. Next players turn.
You are on square 84. Hit enter to roll the die.
Player 1 on square 84 rolls a 1 and moves to square 85
Player 2 on square 35 rolls a 2 and moves to square 37
Player 3 on square 97 rolls a 3 and moves to square 100
Player 3 wins!
```

## Phix

{{trans|C#}}

```
constant sixesThrowAgain = true
constant snl = new_dict({{4,14},{9,31},{17,7},{20,38},{28,84},{40,59},{51,67},{54,34},
{62,19},{63,81},{64,60},{71,91},{87,24},{93,73},{95,75},{99,78}})
constant msgs = {". Oops! Landed on a snake. Slither down to %d.\n", -- (next<square)
" and moves to square %d\n", -- (next=square)
". Yay! Landed on a ladder. Climb up to %d.\n"} -- (next>square)
function Turn(integer player, square)
while true do
integer roll = rand(6)
printf(1,"Player %d, on square %d, rolls a %d", {player, square, roll})
if square+roll>100 then
puts(1," but cannot move.\n")
else
square += roll
integer next = getd(square,snl)
if next=0 then next=square end if
printf(1,msgs[compare(next,square)+2],next)
square = next
if square==100 then exit end if
end if
if roll<6 or not sixesThrowAgain then exit end if
puts(1,"Rolled a 6 so roll again.\n")
end while
return square
end function
procedure main()
sequence players = {1,1,1} -- three players starting on square one
while true do
for i=1 to length(players) do
players[i] = Turn(i, players[i])
if players[i]==100 then
printf(1,"Player %d wins!\n",i)
return
end if
end for
end while
end procedure
main()
```

{{out}}

```
Player 1, on square 1, rolls a 2 and moves to square 3
Player 2, on square 1, rolls a 1 and moves to square 2
Player 3, on square 1, rolls a 3. Yay! Landed on a ladder. Climb up to 14.
...
Player 3, on square 89, rolls a 5 and moves to square 94
Player 1, on square 90, rolls a 3. Oops! Landed on a snake. Slither down to 73.
Player 2, on square 97, rolls a 3 and moves to square 100
Player 2 wins!
```

## Python

import random import sys snl = { 4: 14, 9: 31, 17: 7, 20: 38, 28: 84, 40: 59, 51: 67, 54: 34, 62: 19, 63: 81, 64: 60, 71: 91, 87: 24, 93: 73, 95: 75, 99: 78 } sixesRollAgain = True def turn(player, square): while True: roll = random.randint(1,6) sys.stdout.write("Player {0} on square {1}, rolls a {2}".format(player, square, roll)) if square + roll > 100: print " but cannot move." else: square += roll print " and moves to square {0}".format(square) if square == 100: return 100 next = snl.get(square, square) if square < next: print "Yay! landed on a ladder. Climb up to {0}.".format(next) if square == 100: return 100 square = next elif square > next: print "Oops! Landed on a snake. Slither down to {0}.".format(next) square = next if roll < 6 or not sixesRollAgain: return square print "Rolled a 6 so roll again." def main(): players = [1, 1, 1] while True: for i in range(0, 3): ns = turn(i+1, players[i]) if ns == 100: print "Player {0} wins!".format(i+1) return players[i] = ns; print main()

## Racket

```
#lang racket/base
(define portals (hash 4 14 9 31 17 7 20 38 28 84 40 59 51 67 54 34 62 19 63 81 64 60 71 91 87 24 93 73 95 75 99 78))
(define (find-game-winner n-players reroll-on-six? (win values))
(let turn ((positions-map (for/hash ((p n-players)) (values p 1))) (player 0))
(newline)
(let ((die (add1 (random 6)))
(position (hash-ref positions-map player)))
(printf "player ~a at ~a rolls ~a: " (add1 player) position die)
(let* ((try-position (+ position die))
(new-position
(cond [(> try-position 100) (display "player can't move beyond the end.") position]
[(= try-position 100) (display "player wins!") try-position]
[(hash-ref portals try-position #f)
=> (λ (slide-to)
(printf "~a from ~a to ~a." (if (> slide-to try-position) "LADDER" "SNAKE") try-position slide-to)
slide-to)]
[else (printf "landed on ~a." try-position) try-position])))
(if (= new-position 100)
(win (add1 player))
(turn (hash-set positions-map player new-position)
(if (and (= 6 die) reroll-on-six?)
(begin0 player (display " [6] rolls again!"))
(modulo (add1 player) n-players))))))))
(module+ main
(find-game-winner 5 #t (λ (p) (printf "~%~%The winner of the game is player #~a" p))))
```

{{out}}

```
player 1 at 1 rolls 2: landed on 3.
player 2 at 1 rolls 3: LADDER from 4 to 14.
player 3 at 1 rolls 6: landed on 7. [6] rolls again!
player 3 at 7 rolls 4: landed on 11.
player 4 at 1 rolls 3: LADDER from 4 to 14.
player 5 at 1 rolls 5: landed on 6.
player 1 at 3 rolls 1: LADDER from 4 to 14.
player 2 at 14 rolls 3: SNAKE from 17 to 7.
player 3 at 11 rolls 4: landed on 15.
...
player 3 at 86 rolls 5: landed on 91.
player 4 at 85 rolls 1: landed on 86.
player 5 at 68 rolls 6: landed on 74. [6] rolls again!
player 5 at 74 rolls 1: landed on 75.
player 1 at 59 rolls 1: landed on 60.
player 2 at 94 rolls 6: player wins!
The winner of the game is player #2
```

## REXX

{{trans|D}}

```
/*REXX program plays "Snakes and Ladders" game for any number of players (default 3). */
parse arg np seed . /*obtain optional arguments from the CL*/
if np=='' | np=="," then np= 3 /*Not specified? Then use the default.*/
if datatype(seed, 'W') then call random ,,seed /*maybe use a seed for the RANDOM BIF.*/
pad= left('',7) /*variable value used for indenting SAY*/
do k=1 for 100; @.k= k /*assign default values for board cells*/
end /*k*/ /* [↑] number when landing on a square*/
/* [↓] define ladder destinations. */
@.4=14; @.9=31; @.20=38; @.28=84; @.40=59; @.51=67; @.63=81; @.71=91; @.95=75
@.17=7; @.54=34; @.62=19; @.64=60; @.87=24; @.93=73; @.99=78
/* [↑] define snake destinations. */
player.= 1 /*start all players on the 1st square. */
do games=1 until $==100; say center(' turn ' games" ", 75, "─")
do j=1 for np until $==100; $= turn(j, player.j); player.j= $
end /*j*/ /*process each of the number of players*/
end /*games*/ /*exit both loops when there's a winner*/
say pad 'Player ' j " wins!" /*announce the winner; the game is over*/
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
turn: parse arg P, square; ?= random(1, 6) /*simulate a roll of a six─sided die. */
@does= pad 'Player ' P " on square " right(square, 2) ' rolls a ' ?
if square+?>100 then do; say @does " but can't move. Next player's turn."
return square
end
else do; square= square + ? /*move a player.*/
say @does " and moves to square" right(square, 3)
end
next= @.square /*where moved to*/
@oops= pad pad 'Oops! Landed on a snake, slither down to' right(next, 3)
@ladder= pad pad 'Yay! Landed on a ladder, climb up to' right(next, 3)
if square<next then say right(@ladder, 69)
else if square>next then say right(@oops , 69)
return next
```

{{out|output|text= when using the default input:}}

```
───────────────────────────────── turn 1 ─────────────────────────────────
Player 1 on square 1 rolls a 5 and moves to square 6
Player 2 on square 1 rolls a 3 and moves to square 4
Yay! Landed on a ladder, climb up to 14
Player 3 on square 1 rolls a 5 and moves to square 6
───────────────────────────────── turn 2 ─────────────────────────────────
Player 1 on square 6 rolls a 5 and moves to square 11
Player 2 on square 14 rolls a 4 and moves to square 18
Player 3 on square 6 rolls a 3 and moves to square 9
Yay! Landed on a ladder, climb up to 31
───────────────────────────────── turn 3 ─────────────────────────────────
Player 1 on square 11 rolls a 6 and moves to square 17
Oops! Landed on a snake, slither down to 7
Player 2 on square 18 rolls a 3 and moves to square 21
Player 3 on square 31 rolls a 2 and moves to square 33
───────────────────────────────── turn 4 ─────────────────────────────────
Player 1 on square 7 rolls a 5 and moves to square 12
Player 2 on square 21 rolls a 4 and moves to square 25
Player 3 on square 33 rolls a 3 and moves to square 36
───────────────────────────────── turn 5 ─────────────────────────────────
Player 1 on square 12 rolls a 4 and moves to square 16
Player 2 on square 25 rolls a 3 and moves to square 28
Yay! Landed on a ladder, climb up to 84
Player 3 on square 36 rolls a 6 and moves to square 42
───────────────────────────────── turn 6 ─────────────────────────────────
Player 1 on square 16 rolls a 6 and moves to square 22
Player 2 on square 84 rolls a 1 and moves to square 85
Player 3 on square 42 rolls a 3 and moves to square 45
───────────────────────────────── turn 7 ─────────────────────────────────
Player 1 on square 22 rolls a 6 and moves to square 28
Yay! Landed on a ladder, climb up to 84
Player 2 on square 85 rolls a 3 and moves to square 88
Player 3 on square 45 rolls a 4 and moves to square 49
───────────────────────────────── turn 8 ─────────────────────────────────
Player 1 on square 84 rolls a 4 and moves to square 88
Player 2 on square 88 rolls a 6 and moves to square 94
Player 3 on square 49 rolls a 1 and moves to square 50
───────────────────────────────── turn 9 ─────────────────────────────────
Player 1 on square 88 rolls a 3 and moves to square 91
Player 2 on square 94 rolls a 4 and moves to square 98
Player 3 on square 50 rolls a 4 and moves to square 54
Oops! Landed on a snake, slither down to 34
──────────────────────────────── turn 10 ─────────────────────────────────
Player 1 on square 91 rolls a 6 and moves to square 97
Player 2 on square 98 rolls a 2 and moves to square 100
Player 2 wins!
```

## Ruby

NONE = 0; LADDER = 1; SNAKE = 2; STAY = 1; MOVE = 2; WIN = 3 class Cell @type; @to; attr_reader :type, :to def initialize; @type = NONE; @to = 0; end def set( t, o ); @type = t; @to = o; end end class Player @pos; @name; attr_accessor :pos; attr_reader :name def initialize( n ); @pos = 0; @name = n; end def play( dice ) s = dice.roll; return s, STAY if @pos + s > 99 @pos += s; return s, WIN if @pos == 99 return s, MOVE end end class Die @sides; def initialize( s = 6 ); @sides = s; end def roll; return 1 + rand( @sides ); end end def initBoard @board = Array.new( 100 ); for i in 0 .. 99; @board[i] = Cell.new(); end @board[3].set( LADDER, 13 ); @board[8].set( LADDER, 30 ); @board[19].set( LADDER, 37 ); @board[27].set( LADDER, 83 );@board[39].set( LADDER, 58 ); @board[50].set( LADDER, 66 ); @board[62].set( LADDER, 80 ); @board[70].set( LADDER, 90 ); @board[16].set( SNAKE, 6 ); @board[61].set( SNAKE, 18 ); @board[86].set( SNAKE, 23 ); @board[53].set( SNAKE, 33 ); @board[63].set( SNAKE, 59 ); @board[92].set( SNAKE, 72 ); @board[94].set( SNAKE, 74 ); @board[98].set( SNAKE, 77 ); end def initPlayers @players = Array.new( 4 ); for i in 0 .. @playersCount - 1; @players[i] = Player.new( "player " << i + 49 ); end end def play initBoard; initPlayers; @die = Die.new while true for p in 0 .. @playersCount - 1 puts; puts if( 0 == p ) print "#{@players[p].name}, your turn. Your position is cell #{@players[p].pos + 1}.\n"<< "Press [RETURN] to roll the die." gets; np = @players[p].play( @die ); print "You rolled a #{np[0]}\n" if np[1] == WIN print "You reached position #{@players[p].pos + 1} and win the game!!!!\n"; return elsif np[1] == STAY; print "Sorry, you cannot move!\n" else print "Your new position is cell #{@players[p].pos + 1}.\n"; end else np = @players[p].play( @die ); print "#{@players[p].name} rolled a #{np[0]}.\n" if np[1] == WIN print "He reached position #{@players[p].pos + 1} and wins the game!!!!\n"; return elsif np[1] == STAY; print "But he cannot move....\n" else print "His new position is cell #{@players[p].pos + 1}.\n"; end end s = @board[@players[p].pos].type next if s == NONE @players[p].pos = @board[@players[p].pos].to case s when SNAKE; print "What a pitty, landed on a snake. " when LADDER; print "Lucky move! Landed on a ladder. " end print "New position is cell #{@players[p].pos + 1}.\n" end end end @playersCount = 4; @board; @players; @die play

{{out}}

```
...
player 1, your turn. Your position is cell 97.
Press [RETURN] to roll the die.
You rolled a 5
Sorry, you cannot move!
player 2 rolled a 5.
His new position is cell 49.
player 3 rolled a 4.
But he cannot move....
player 4 rolled a 6.
His new position is cell 91.
player 1, your turn. Your position is cell 97.
Press [RETURN] to roll the die.
You rolled a 3
You reached position 100 and win the game!!!!
```

## Visual Basic .NET

{{trans|C#}}

```
Module Module1
ReadOnly SNL As New Dictionary(Of Integer, Integer) From {
{4, 14},
{9, 31},
{17, 7},
{20, 38},
{28, 84},
{40, 59},
{51, 67},
{54, 34},
{62, 19},
{63, 81},
{64, 60},
{71, 91},
{87, 24},
{93, 73},
{95, 75},
{99, 78}
}
ReadOnly rand As New Random
Const sixesThrowAgain = True
Function Turn(player As Integer, square As Integer) As Integer
Do
Dim roll = rand.Next(1, 6)
Console.Write("Player {0}, on square {1}, rolls a {2}", player, square, roll)
If square + roll > 100 Then
Console.WriteLine(" but cannot move.")
Else
square += roll
Console.WriteLine(" and moves to square {0}", square)
If square = 100 Then
Return 100
End If
Dim nxt = square
If SNL.ContainsKey(square) Then
nxt = SNL(nxt)
End If
If square < nxt Then
Console.WriteLine("Yay! Landed on a ladder. Climb up to {0}.", nxt)
If nxt = 100 Then
Return 100
End If
square = nxt
ElseIf square > nxt Then
Console.WriteLine("Oops! Landed on a snake. Slither down to {0}.", nxt)
square = nxt
End If
End If
If roll < 6 OrElse Not sixesThrowAgain Then
Return square
End If
Console.WriteLine("Rolled a 6 so roll again.")
Loop
End Function
Sub Main()
Dim players = {1, 1, 1}
Do
For i = 1 To players.Length
Dim ns = Turn(i, players(i - 1))
If ns = 100 Then
Console.WriteLine("Player {0} wins!", i)
Return
End If
players(i - 1) = ns
Console.WriteLine()
Next
Loop
End Sub
End Module
```