What is a neat way of breaking out of many for loops at once?

Question

Suppose I need to break out of three or four nested for loops at once at the occurence of some event inside the innermost loop. What is a neat way of doing that?

Answer 1

If premature completion of any cycle always means that you have to break the enclosing cycle as well, then you don't need any extra flags. The whole thing might just look as follows

int i, j, k;
for (i = 0; i < 100; i++) {
    for (j = 0; j < 100; j++) {
        for (k = 0; k < 100; k++) {
            if (k == 50)
                break;
        }
        if (k < 100) break;
    }
    if (j < 100) break;
}

In my experience, this is what is needed in majority of cases.