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Javascript Variables

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js variables

// Can be a number
var myVar = 21
//Can be a string
var myVar2 = "string"
// Used in a function
function printVar(parvar) {
  print(parvar);
}

printVar(myVar2);
// prints "string"
printVar(myVar);
// prints 21

variables javascript

var example = "hello";
document.write(example);// it will say hello when it runs

js variable

let x;
x = 102;

js variables

// 3 ways to create

var mrVariable = 'x'; // You can set it to to a string ( '' ) or no. ( 0 ). It 
// is globally defined

let myVariaible2 = 'y'; // You can set it to string or no. let is block scoped

const myVariable = 'z'; // It is block scoped, can be a string or no. and can't 
//be reassigned

js var

var x = y, y = 'A';
console.log(x + y); // non definito

javascript variable

// This is best way to make a variable
// Varibales Store Data
var variable1 = 56;
//OR
var variable2 = true;

var variable3 = "Hello World";

Variables in javascript

var a;                          // variable
var b = "init";                 // string
var c = "Hi" + " " + "Joe";     // = "Hi Joe"
var d = 1 + 2 + "3";            // = "33"
var e = [2,3,5,8];              // array
var f = false;                  // boolean
var g = /()/;                   // RegEx
var h = function(){};           // function object
const PI = 3.14;                // constant
var a = 1, b = 2, c = a + b;    // one line
let z = 'zzz';                  // block scope local variable

javascript variable

var myString = "string"; //var can be redefined
var myInt = 34; //var can be redefined
const myString2 = "string"; //const cannot be redefined
const myInt2 = 69; //const cannot be redefined

js var

var a = 'A';
var b = a;

// è come dire:

var a, b = a = 'A';

javascript variables

// here are the ways to define variables
var x = "hi"; // for global variables
let x = "hi"; // for block-scoped variables
const x = "hi"; // for block-scoped variables which can not be reassigned

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