I have a while loop inside a for loop. If the condition of the while loop is not satisfied, I want to jump directly to the end of the for loop. Could anyone please help?

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RACHNA DANDWANI 2018-7-2

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评论： RACHNA DANDWANI 2018-7-3

 t=0:0.5:100;
 for i=1:length(t)
        while(condition1)
           display('Task accomplished')
        end                                  %while loop ends here 
       statement a
       statement b
 end                                         %for loop ends here
 statement c                                 %If condition 1 fails, this is where I want to jump to (directly out of the for loop, irrespective of the value of t)

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Rik 2018-7-2

I agree with Adam. It seems like you want if instead of while, and that the command you're looking for is break.

RACHNA DANDWANI 2018-7-3

Thank you. I tried your solution and realised my approach needed correction. My code works fine now.

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Answer 1

Adam Danz 2018-7-3

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编辑：Adam Danz 2018-7-3

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Statements a and b are necessary in my code to change the condition 1. Hence I want the entire loop to run such that each iteration of the for loop changes the variables in a way that renders condition1 false. As soon as that happens, I'd like to come out of the for loop.

The goal here is still not entirely clear but based on your comment above, as @Rik Wisselink mentioned, it seems like you want a conditional statement in place of the while loop and a while loop in place of the for loop. Does this do what want it to?

t=0:0.5:100;
lengthT = length(t);
i = 0;
while i <= lengthT          
    if condition1
        disp('Task accomplished')
        statement a
        statement b
        i = i+1;
    else
        break  %When condition1 becomes false, here we enter the while-loop
    end
end
% We end up here if condition1 becomes false -OR- when i>lengthT
statement c

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RACHNA DANDWANI 2018-7-3

Thank you. I tried replacing a while loop with an if statement and it served my purpose

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Answer 2

Alpha Bravo 2018-7-2

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This is one way to do it.

t=0:0.5:100;
 for i=1:length(t)
        while(condition1)
           display('Task accomplished')
           code                              % do something here to change condition1
        end                                  %while loop ends here 
        if (~condition1)
           break
        end
        statement a
        statement b
 end                                         %for loop ends here
 statement c

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Dennis 2018-7-3

编辑：Dennis 2018-7-3

If you need statement a/b to change condition1 you need to do that inside your while loop.

I actually just wanted to type a small example, however i noticed that if you want to exit your for loop the moment condition 1 gets false and you change condition 1 inside your while loop, the for loop will only be iterated once.

Maybe you can clarify what you are trying to do?

RACHNA DANDWANI 2018-7-3