Original link: I can prove 2x2 is 5 / LinkedIn.
It does print 5.
Demo and explanation:
public class TwoTimesTwo {
public static void main(String[] args) {
double c = -9007199254740992L;
var r = c - 1 + 1 - c + (2 * 2);
System.out.println((int)r);
System.out.printf("%016X = %f\n", Double.doubleToRawLongBits(c), c);
System.out.printf("%016X = %f\n", Double.doubleToRawLongBits(c - 1), c - 1);
System.out.printf("%016X = %f\n", Double.doubleToRawLongBits(c - 1 + 1), c - 1 + 1);
System.out.printf("%016X = %f\n", Double.doubleToRawLongBits(c - 1 + 1 - c), c - 1 + 1 - c);
}
}
5 C340000000000000 = -9007199254740992.000000 C340000000000000 = -9007199254740992.000000 C33FFFFFFFFFFFFF = -9007199254740991.000000 3FF0000000000000 = 1.000000