Return back to a specific line

Question

Arnab Pal 2019-4-18

1
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https://ww2.mathworks.cn/matlabcentral/answers/457165-return-back-to-a-specific-line

评论： Adam Danz 2019-4-23

I have more while and for loop, I need to go beginning. ex:

1. while ()

2. for ()

3. if (condition)

4. Go back to starting of the code i.e line 1

5. else

6. code for some action

7. end

8. end

8. for ()

9. some calculation

8. end

9. end

I need like this, Please help. If I use break, it will break that first for loop only and it will go to next for loop, but I don't want that.

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KALYAN ACHARJYA 2019-4-18

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Answer 1

Adam Danz 2019-4-18

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https://ww2.mathworks.cn/matlabcentral/answers/457165-return-back-to-a-specific-line#answer_371207

编辑：Adam Danz 2019-4-23

在 MATLAB Online 中打开

Here's a functional example that you can run or step through in debug mode. The flag 'continueForLoop' determines whether the for-loops will continue execution.

c = 0;                      %counter for while-loop
while c < 5
    % Reset flag (when true, for-loop continues)
    continueForLoop = true;
    for i = 1:5
        if rand(1) < 0.5 && continueForLoop
            % set flag that will ignore the rest of the for-loop
            continueForLoop = false;
        elseif continueForLoop
            disp('For-loop continues')
        end
    end
    if continueForLoop
        for j = 1:3
            x = rand(1);
        end 
    end
    % increment counter
    c = c+1;
end 

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Guillaume 2019-4-23

在 MATLAB Online 中打开

I would add a break in the first if instead of the ContinueForLoop test. There's no point continuing iterating the first for to just do nothing.

c = 0;                      %counter for while-loop
while c < 5
    % Reset flag (when true, for-loop continues)
    continueForLoop = true;
    for i = 1:5
        if rand(1) < 0.5
            % set flag that will ignore the rest of the for-loop
            continueForLoop = false;
            break;  %and bail out of current for loop
        elseif continueForLoop
            disp('For-loop continues')
        end
    end
    if continueForLoop
        for j = 1:3
            x = rand(1);
        end 
    end
    % increment counter
    c = c+1;
end 