Bit operators / << - left shift / Essential C++

#include <iostream>

int main(int argc, char **argv) {
    int a = 2147483647; // 0111 1111 1111 1111 1111 1111 1111 1111
    int b = a << 1;     // 1111 1111 1111 1111 1111 1111 1111 1110
    
    std::cout << "a = " << a << ", b = " << b << std::endl;
}