What is happening in this while loop

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prasanna
prasanna 2013-10-28
评论： Image Analyst 2013-10-28
this is a peice of code written in matlab.
while(flag==1)
flag=0;
disp('end of loop');
end
surprisingly, this does not display the string and if i remove disp statement and figure1 window appears. can anyone explain why?

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Andreas Justin
Andreas Justin 2013-10-28
flag = true
while flag
flag=0;
disp('end of loop');
end
see: doc flag
  1 个评论
Image Analyst
Image Analyst 2013-10-28
I bet a lot of people don't know flag is the name of a built-in function - I didn't. So it's best to use some other name instead of flag, like keepLooping, or keepGoing, or something. And your point of initializing flag prior to entering the loop is really the key issue here (because you could actually overwrite the flag function with your own variable of the same name if you wanted to, though it's not advised).

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