A bug in my project

Question

public class Program
{
public static void main(String[] args) {
int x = 12;
while (x < 100) {
System.out.println(x);
x * 2;
}
}
}

Answer 1

It should be x = x*2 or shortly x *= 2. When you just write x*2 it's not clear for the program where do you store the result of that operation.