Java for Loop evaluation

Question

I want to know if the condition evaluation is executed in for and while loops in Java every time the loop cycle finishes.

Example:

Answer 1

Yes, the expression must be evaluated for each iteration of the loop to determine whether to stay inside the loop or continue program execution.

Remember, you can do things like this:

for(int a = 0, z = 26; a < z; a++, z--){
    // Do some work
}

In that case, both sides of the expression will change and must be evaluated for each iteration.

And you're right, if you have calculations in the for loop condition that can be moved out to a separate variable, you should do that:

for(int i = 0; i < ((someCount / 2) * 21.6); i++){
}

Could easily be:

int maxVal = (someCount / 2) * 21.6;

for(int i=0; i < maxVal; i++){
{