Further controlling loops with break and continue

Rather than relying on goto to get out of sticky situations inside of deeply nested statements, the creators of C provided two very controlled goto-like mechanisms. These are break and continue.

break jumps out of and to the end of the enclosing statement block, whereas continue is used for looping, which goes immediately to the next iteration of the looping statement, skipping any statements that would otherwise be executed in the loop after the continue mechanism.

We have previously encountered the use of break in the switch statement in the preceding chapter, where break caused the execution to resume immediately after the switch statement block. break can also be used to jump to the end of the enclosing statement_body loop.

In the following isPrime() function, break is used to get out of a loop that determines whether the given number is divisible by the counter value; if so, the number is not prime.

The isPrime() function...