Question

Simple question, I know there must be a correct way to do this. I have a CGFloat that increases in increments of 1/16. I want to determine when this value becomes a whole number.

For lack of knowing the right way I am coming up with ideas like having another variable to keep track of the number of iterations and mod 16 it.

Answer 1

While you generally can’t count on fractional floating point numbers to sum up to whole numbers, your case is exception to the rule since 1/16 is 2^(-4) and this number can be represented by float precisely:

- (void)testFloat
{
    float a = 0.0f;

    while (a != 2.0f) {
        a += 0.0625f;
    }

    NSLog(@"OK!");
}