js var
var a;
console.log(a); // scrive in console "undefined" o "" a seconda del browser usato.
console.log('still going...'); // scrive in console "still going...".js var
var a;
console.log(a); // scrive in console "undefined" o "" a seconda del browser usato.
console.log('still going...'); // scrive in console "still going...".variables in js
var Hello = "World";
let bool = false;
const int = 8788;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 variablejs var
console.log(a); // Genera un ReferenceError.
console.log('still going...'); // Non verrà eseguito.js var
function x() {
y = 1; // Genera un ReferenceError in strict mode
var z = 2;
}
x();
console.log(y); // scrive "1" in console
console.log(z); // Genera un ReferenceError: z non è definita fuori dalla funzione xCopyright © 2021 Codeinu
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