double arithmetic and equality in Java

Question

Here\'s an oddity (to me, at least). This routine prints true:

double x = 11.0;
double y = 10.0;
if (x-y == 1.0) {
    // print true
} else {
    // print fa         


        

Answer 1

This comes up in currency calculations all the time. Use BigDecimal if you need exact numerical representation at the cost of not having hardware enabled performance, of course.