restarting a while loop without finishing the remaining code.

I am trying to make a while loop that will restart the program when the criteria is met. Currently it will restart the program but only after the entire program has run and i want it to restart before finishing.

Answer 1

[Marta Salas]

continue command restart the while loop. When condition holds the code after the if will not be run.

while(1) 
    %%your code 

      if(condition)
          continue;  
      end 
      %%your code
  end

[Justin]

I tried it and it did not do what was necessary, I have edited my original question because I was not clear enough.

My program will restart the while loop but it finishes running the program first- which i do not want it to do.

Other options?

[Marta Salas]

If the condition is true, the code after the if should not be execute ever. Are you sure your condition becomes true?

[Justin]

I think I may be messing something up. If you would like to look I have attached it, the code is not as clean as my usual stuff but you can still probably follow it, if not thanks for the help this far.

[Justin]

I had to submit it for my class but i want to figure out why i am messing this up.

[Marta Salas]

where is the attached code?

[Justin]

sorry i never actually clicked attach file

Answer 2

[Marta Salas]

Just in case you need the solution to your problem. You wanna break the while loop when all the values are not positive, so, you used 2 nested for:

for i=1:1:r                            
    for j=1:1:c
        if MS(i,j)<=0
            fprintf('Please enter a new matrix with all positive values.\n')
            z=1;
            continue;
        end
    end
end

The "continue" statement passes control to the next iteration of the for loop or while loop in which it appears, skipping any remaining statements in the body of the loop. In this code you have nested for and while loops, it skips iteration on this for loop "for j=1:1:c".

For your problem, I would propose a solution like this one:

   % look for values <=0 and [r,c] are the indexes where these values appear 
   % if there is no negative values, r and c are empty arrays
    [r,c]= find(MS<=0);                      
    if(~isempty(r) & ~isempty(c))
        fprintf('Please enter a new matrix with all positive values.\n')
        z=1; 
        continue; 
    end