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Simple question loop for

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Laurie
Laurie on 19 Oct 2020
Closed: MATLAB Answer Bot on 20 Aug 2021
Hello,
It's a very basic question because I'm new in the world of Matlab.
I want to know what happend when there is a for loop like this :
for i = 1:n
% Inside of the loop
end
but n = 0
Does it enter the loop or not at all ?
Thank you,
Laurie

Answers (2)

KSSV
KSSV on 19 Oct 2020
Edited: KSSV on 19 Oct 2020
Lear debugging code. It will be help ful for you and easy.
If n = 0, it will not enter the loop.
n = 0 ;
for i = 1:n
fprintf("%d\n",i) % this will print index i to verify
end

Asad (Mehrzad)  Khoddam
Asad (Mehrzad) Khoddam on 19 Oct 2020
You can simply add a disp command to see that nothing will be printed when n=0. It means that the statements inside the loop will not be executed.
n=0;
for i = 1:n
% test
disp(i);
% Inside of the loop
end
  1 Comment
Laurie
Laurie on 19 Oct 2020
Thank you very much for your reply !

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