Then you call `printf` twice every loop instead of once. `printf` is buffered so you aren't making two system calls, but you are still making two function calls.

Maybe it's a performance/brevity compromise, but the latter is the issue the I addressed. The least-calls solution would probably be to print the whole output as a single string constant.

then you'd get \n \n fizz\n \n buzz\n rather than fizz\n buzz\n

The canonical FizzBuzz wants

1\n2\nFizz\n4\nBuzz\n...\nFizzBuzz\n

If you did not print anything for some cases, you're right that it could not be unconditional (though it could still be done at the end with a flag).

oops, yes, my mistake.