Functions in Standard Library (Examples)

#include <iostream>
#include <typeinfo>

int main(){

	int x = 10;
	std::cout << "x type: " << typeid(x).name() << std::endl;

	return 0;
}

#include <iostream>
#include <type_traits>

int main(){

	int x = 10;
	std::cout << std::is_const_v<decltype(x)> <<std::endl; //C++17
	//or
	std::cout << std::is_const<decltype(x)>::value << std::endl;
	return 0;
}