a = b << 1 with example code
#include <stdio.h>
int main()
{
int x = 19;
unsigned long long y = 19;
printf("x << 1 = %d\n", x << 1);
printf("x >> 1 = %d\n", x >> 1);
// shift y by 61 bits left
printf("y << 61 = %lld\n", y << 61);
return 0;
}