var myString = 'this is a string';
var myInteger = 42;
var myFloat = 2.2;
var myObject = {key: 'value', mentor: 'léo'};
var MyArray = ['element1', 'element2', 'element3'];

console.log(myString); //Shows a string in the console
console.log(myInteger); //Shows the integer in the console
//etc