What is the possible code that can be used to return to primary while?

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arwa 2016-12-23

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https://ww2.mathworks.cn/matlabcentral/answers/318006-what-is-the-possible-code-that-can-be-used-to-return-to-primary-while

评论： Image Analyst 2016-12-23

hi, I have this code ;

 while(true)       % primary while(step 1)
  while(true)
     if (condition)
         statement
         ...
         statement
         continue
     end
  end
  while(true)
     if (condition)
         statement
         ...
         statement
         (??)        % Here, I want to return to primary while (i.e step 1)
     else
     end
  end

What is the possible code that can be used at (??) mark?

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Answer 1

Les Beckham 2016-12-23

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https://ww2.mathworks.cn/matlabcentral/answers/318006-what-is-the-possible-code-that-can-be-used-to-return-to-primary-while#answer_248319

Use 'break'

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arwa 2016-12-23

OK. Thanks

Image Analyst 2016-12-23

but that won't fix your second while. That loop will never exist because you don't have a break in it, so you'll never even get to the third while. A "continue" merely tosses control to the bottom of the while loop but let's it continue, forever in your case. You should always have a failsafe in your loop conditions to prevent infinite loops.

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