Variables & Data Types in C++

#include <iostream>
#include <string>
using namespace std;
int main() {
    int    age     = 20;
    double salary  = 50000.75;
    char   grade   = 65;   // A
    bool   isPass  = true;
    string name    = "Gagan";
    
    cout << "Name:   " << name    << endl;
    cout << "Age:    " << age     << endl;
    cout << "Salary: " << salary  << endl;
    cout << "Grade:  " << grade   << endl;
    cout << "Passed: " << boolalpha << isPass << endl;
    return 0;
}

auto x = 42;          // int
auto y = 3.14;        // double
auto z = "Hello";     // const char*
auto s = string("Hi");// string

cout << typeid(x).name() << endl;  // i (int)