make variable js code example

Example 1: javascript variable

var user_name = prompt("Please enter your name:", "Type here");
alert("Hello " + user_name);

Example 2: how to instialise var in js

var variable-name = number;
/*eg*/
var a = 10;

Example 3: javascript variables

// Also let, const
var e_number = 0;
var e_string = '';
var e_true = true;
var e_false = false;
var e_undefined = undefined;