How to break out of nested loops?

bool stop = false;
for (int i = 0; (i < 1000) && !stop; i++)
{
    for (int j = 0; (j < 1000) && !stop; j++)
    {
        if (condition)
            stop = true;
    }
}

Use:

if (condition) {
    i = j = 1000;
    break;
}

No, don't spoil the fun with a break. This is the last remaining valid use of goto ;)

If not this then you could use flags to break out of deep nested loops.

Another approach to breaking out of a nested loop is to factor out both loops into a separate function, and return from that function when you want to exit.

Summarized - to break out of nested loops:

1. use goto
2. use flags
3. factor out loops into separate function calls

Couldn't resist including xkcd here :)

source

Goto's are considered harmful but as many people in the comments suggest it need not be. If used judiciously it can be a great tool. Anything used in moderation is fun.