Why does my code only print the final iteration?

function [ ] = forloopef(x , y, m, n)
while x < 49
    [x] = 7 + x
end
while y < 49
    [y] = 7 + y
end
while m > 7
    [m] = m - 14
end
while n > 7
    [n] = n - 14
end
hold on
rectangle('Position',[x y m n])
axis([0 100 0 100])

[Walter Roberson]

What input are you passing? What does your call look like?

[Guillaume]

Note 1: I would get out of the habit of writing brackets [] around the assignee in your code. Not only is it completely unnecessary, it is also likely to cause you problems in some future code.

   x = 7 + x

works just as well.

Note 2: And of course none of the while loops are necessary:

x = max(x, mod(x, 7) + 49);
y = max(x, mod(y, 7) + 49);
m = min(m, mod(m + 6, 14) - 6;
n = min(m, mod(n + 6, 14) - 6;

[Image Analyst]

Don't double space code to format it. Simply learn to format it. See the tutorial: http://www.mathworks.com/matlabcentral/answers/13205#answer_18099 Basically, paste in code, highlight it, and click the {}Code icon.