Will my compiler ignore useless code?

Question

I\'ve been through a few questions over the network about this subject but I didn\'t find any answer for my question, or it\'s for another language or it doesn\'t answer totally

Answer 1

In your loop there are two an operation implicit in each iteration. An increment:

j++;

and comparison

j

So, the loop is not empty although it looks like it is. There is something being executed at the end and this is not ignored by the compiler of course.

This happens also in other loops.