What is the output of the following script?
public class SomeClass {
public static void main(String[] args) {
int x = 2147483647; // 2147483647 == 2**31 - 1
if (x < 2*x) {
System.out.println("Everything's ok:");
} else {
System.out.println("It's weird:");
}
System.out.println("x = " + x);
System.out.println("2*x = " + 2*x);
}
}
. . . . . . . . . . . . . . . . . . . . . .
Answer
It's weird:
x = 2147483647
2*x = -2
Explanation
2*x is out of Java Integer range, so it comes back at the other end.