Erlang won't let me end a function

Question

here's my code for an RPS game. I keep getting a syntax error whenever I try to put "end." and it won't let me end the function. It says syntax error before: 'end'.

-module(project).
-export([rps/0]).

rps() ->
    Computer = rand:uniform(3),
    {ok,Player} = io:read("Rock, Paper, or Scissors?"),
    Win = fun() -> io:fwrite("You Win!"),
    Lose = fun() -> io:fwrite("You Lose."),

    % player chooses rock (win, lose)
    if
        Player == "Rock" ->
            if
                Computer == 3 ->
                    Win();
                Computer == 2 ->
                    Lose()
            end;
    % player chooses paper (win, lose)
    if
        Player == "Paper" ->
            if
                Computer == 1 ->
                    Win();
                Computer == 3 ->
                    Lose()
            end;
    % player chooses scissors (win, lose)
    if
        Player == "Scissors" ->
            if
                Computer == 2 ->
                    Win();
                Computer == 1 ->
                    Lose()
            end;
end.  <--------- (this is where error occurs)
                

Answer 1

There were a few mistakes here:

• fun without "end" (x2) Win = fun() -> io:fwrite("You Win!") end,
• if-syntax

correct code:

-module(project).
-export([rps/0]).

rps() ->
    Computer = rand:uniform(3),
    {ok,Player} = io:read("Rock, Paper, or Scissors?"),
    Win = fun() -> io:fwrite("You Win!") end,
    Lose = fun() -> io:fwrite("You Lose.") end,

    % player chooses rock (win, lose)
    if
        Player == "Rock" ->
            if
                Computer == 3 ->
                    Win();
                Computer == 2 ->
                    Lose()
            end;
    % player chooses paper (win, lose)
        Player == "Paper" ->
            if
                Computer == 1 ->
                    Win();
                Computer == 3 ->
                    Lose()
            end;
    % player chooses scissors (win, lose)
        Player == "Scissors" ->
            if
                Computer == 2 ->
                    Win();
                Computer == 1 ->
                    Lose()
            end
    end.