C++

Standard output:

Cout is the standard output.
It's used like this:

cout << "Hello";

You can also output numbers and variables.

cout << 23 << endl;
cout << variable << endl;

The « (Insertion Operator) can be used more than once in a statement.

cout << "Hello, my name is " << name << " and i'm " << age << " years." << endl;

Standard input:

Cin is the standard input.
It's used like this:

string str;
cin >> str;

Example:

#include <iostream>
using namespace std;
 
int main()
{
  string str;
  cout << "Whats's your favourite food? ";
  cin >> str;
  cout << "Cool, I love " << str << " too.\n";
  return 0;
}