Exit from internal nested loop in c#

Question

2.00/5 (2 votes)

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When I'm using (goto) to exit from internal loop to go to parent loop to complete the loop, which keyword , or which words can i use ?

for example :

for(i=0 , i <= 100 , i++)
{
for(j=0 , j < 20 , j++)
{
if (j = 5)
goto .........?
}
}

Posted 12-Mar-12 7:53am

aodeh

Updated 12-Mar-12 8:08am

v2

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shreekar 12-Mar-12 14:39pm

Please post the updated code with the break statement used. Use some debug.print or such to show the execution flow and where it is going wrong.
P.S.: I am not sure if j=5 is correct for equality checking in C#

Martin Arapovic 12-Mar-12 14:53pm

...and in for loops instead "," ";" needs to be used... Syntax is incorrect...

[no name] 12-Mar-12 20:18pm

if (j == 5)

3 solutions

Solution 3

Hi,
Use break; for exit loop and continue; to iterate to the next element. Check this[^] link.

Posted 12-Mar-12 8:17am

Martin Arapovic

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Tim Groven · Accepted Answer · 2012-03-12T08:15:00

Solution 2

I would just use the command

break;

where your goto statement is.

--Edit:

Are you talking about this?

bool breakUsed = false;

for(i=0;i<=100;i++)
{
   if(breakUsed == false)
   {
      for(j=0;j<20;j++)
      {
         if(j==5)
         {
            breakUsed = true;
            break;
         }
      }
   }
}

Posted 12-Mar-12 8:15am

Tim Groven

Updated 12-Mar-12 9:13am

v2

Comments

aodeh 12-Mar-12 14:19pm

inside the internal loop , and i need to exit just from internal loop and goto parent loop to complete it.

when such a condition happen in internal loop , i need to goto parent loop to complete it , not to complete the sequence of execution ..

Tim Groven 12-Mar-12 15:14pm

I udpated my answer. Is that what you mean?

aodeh 12-Mar-12 16:05pm

yes exactly , really thank you man

Dave Kreskowiak · Accepted Answer · 2012-03-12T08:29:00

Solution 4

You're looking for the break[^] statement.

You don't need goto at all.

Posted 12-Mar-12 8:29am

Dave Kreskowiak

Comments

aodeh 12-Mar-12 14:33pm

break statement , exit from internal and parent loop then complete the sequence of execution.

aodeh 12-Mar-12 14:34pm

i need to go back to parent loop to complete the loop , when i used break or continue the result is : exit from parent and internal loop then complete the sequence of execution .

Dave Kreskowiak 12-Mar-12 14:56pm

Try again. Break will only get out of the INNER loop. It will not exit the outer loop. The outer loop will keep running, and thereby start the inner loop again. The way you're code is structured, you cannot nest a looop inside a loop and then break the inner loop and have the outer loop code skip the inner loop for the duration of the outerloop.

You'll have to put a flag in the outer loop code that check to see if it should run the inner loop at all if that's what you want. Set that flag right before the break statement in the inner loop code.

shreekar 12-Mar-12 15:01pm

I think he has shown just an example with pseudo code. I have added a comment to the original question requesting the actual code with the break statement implemented.

Sergey Alexandrovich Kryukov 12-Mar-12 15:18pm

Sure, a 5. I would ask OP what's the goal of the whole fragment of the code. Maybe, the whole idea is wrong. It's always a good idea to start with requirements.
--SA

Dave Kreskowiak 12-Mar-12 16:15pm

The problem is he's not explaining them very well. I now think he's trying to get the inner loop skipped and keep the outer loop running without running the inner loop again. I can't think of any good reason to do this, but hey, it's not my code and I don't have to worry about stepping in to support it.

Sergey Alexandrovich Kryukov 13-Mar-12 1:02am

It sounds like that, but I would prefer to hear why, first of all. Sure, the question is not clear. I do it in a slightly different way. If I cannot see why OP would be doing what she/he is asking, I'm not interested to answer; I'll either ask why or ignore it. People sometimes want to do weirdest things, why bothering to help them if I cannot see any sense in it? Don't you think such view also makes some sense? :-)
--SA

Dave Kreskowiak 13-Mar-12 14:48pm

True, but I've pretty much given up on understanding why newbies do the things they do. I really don't see him explaining what the point of this code is. If he needs to bail on the inner loop for the duration of the outer loop, I can't think of a single good, or bad, reason to it. I'd run the loops seperately myself, but again, I have no idea what these loops are doing anyway, so it's just a guess.

Sergey Alexandrovich Kryukov 14-Mar-12 3:46am

Understood.
Thank you for this discussion, Dave.
--SA