Thread: breaking a loop

Sorry for the simple question -

If i am in two loops and I put a break in the middle does it stop the loop it is in or does it stop all loops?

Code:

for(i=0; i<10; i++)
{
       for(j=0; j<10; j++)
      {
          if(example[i][j]>100) {break;}
      }
}

Just the inner-most loop.

If you want to exit BOTH loops, then put the double looping into it's own function and use return. Another alternative is to use goto BUT DONT DO THAT OR ELSE I WILL KILL YOU.

Better to design your loops with the exit routes already planned...

Code:

Continue = TRUE;
i = -1;
J = -1;

while (Continue && (i < 10))
{
    ++i;
    while (Continue && (j < 10))
    {
        ++j;
        if (example [i][j] > 100) Continue = FALSE;
    }
}

... or similar.

You generally don't want to do that because it forces an extra check every single time you go through your loops and adds another variable.

thanks all for the help

Another alternative is to use goto BUT DONT DO THAT OR ELSE I WILL KILL YOU.

I remember programming in 'basic' and using GOTO, nowdays everyone threatens to kill you if you use it

>>>
You generally don't want to do that because it forces an extra check every single time you go through your loops and adds another variable.
<<<

The check on a simple boolean is very fast, and I like to have my escape routes planned at the design stage, easy to modify later. The variable would be a stack variable so I don't really care about that either.

In any case, I expect the optimized code generated would be similar.

adrianxw is right. break, return (in the middle of a function), goto are similar in that they break out of a smooth flowing function. They "jump" in an assembly like way and not a high level language like way.