Flag = 0;

while Flag == 0
    for x = 1:10
        if x == 3
            Flag = 1;
        end % end: if
    end % end; for
end % end: while

Can anyone tell me why the while loop condition is not triggering when x is three? It runs the entire for loop and I get a value of 10. I am trying to have a flag trigger when a specific condition is met in the for loop.

Thank you!

Flag = 0;

while Flag == 0
    for x = 1:10
        if x == 3
            Flag = 1;
        end % end: if
    end % end; for
end % end: while

Can anyone tell me why the while loop condition is not triggering when x is three? It runs the entire for loop and I get a value of 10. I am trying to have a flag trigger when a specific condition is met in the for loop.

Thank you!

• matlab
• for-loop
• while-loop

• 4 Because a while loop only checks its guard at the start of each iteration. – Scott Hunter Commented Mar 27 at 18:33
• Ohhhh... I see. Thank you! That makes a lot of sense :) – Alexander Savadelis Commented Mar 27 at 18:35
• 2 Use break or return to exit the for loop early. – horchler Commented Mar 27 at 20:02

1 Answer 1

If you want to break out of the for loop early then you should use break

Flag = 0;

while Flag == 0
    for x = 1:10
        if x == 3
            Flag = 1;
            break     % Exit the 'for' loop
        end
    end
end