MATLAB: Need help to create a function for a roulette simulation

for loopfunctionhelpifif statementMATLABmatlab functionroulettescript

My function does not work and i don't know how to link my input number n with the simulation of the roulette.
There are 18 red, 18 black and 1 green fields. If the ball lands on the field which the user choose then he gets the money back and gets the same amount of money which he used. if the ball lands not on the field which the user choose then he loose his money. 
function [red, black] = n_montecarlo(n)
red = [3 12 7 18 9 14 1 16 5 23 30 36 27 34 25 21 19 32];
black = [26 35 28 29 22 31 20 33 24 10 8 11 13 6 17 2 4 15];
roulette = randi(37); 
for n = red
    if roulette == n
    disp('win')
    else 
        disp('lose')
    for n = black
        if roulette == n
            disp('win')
    else 
        disp('lose')
        end
    end
    end
end
end

Best Answer

"If the ball lands on the field which the user choose"
How does thze user choose a field? By the input n? This input is overwritten by
for n = red
Perhaps you want:
function n_montecarlo(n)
red   = [3 12 7 18 9 14 1 16 5 23 30 36 27 34 25 21 19 32];
black = [26 35 28 29 22 31 20 33 24 10 8 11 13 6 17 2 4 15];
roulette = randi(37);
if n == roulette
    disp('win')
else
    disp('lose')
end
if any(n == red)
    disp('red')
elseif any(n == black)
    disp('black')
else
    disp('green')
end
end
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