Using single quotes with std::cout for printing a string actually prints numbers

Question

#include <iostream>

int main() {
  std::cout << 'hello';
  return 0;
}

This program output is:

1701604463

I wonder why it actually runs, although the compiler gives a warning message: character constant too long for its type.

What these numbers actually mean, are they garbage digits?

Answer 1

It is multicharacter literal which has type int.

Multicharacter literal, e.g. 'AB', has type int and implementation-defined value.