what is var: {} in javascript code example

Example 1: javascript declare a variable

//choose the best for your solution
var myVariable = 22; //this can be a string or number. var is globally defined

let myVariable = 22; //this can be a string or number. let is block scoped

const myVariable = 22; //this can be a string or number. const is block scoped and can't be reassigned

Example 2: js var

var nomevariabile1 [= valore1] [, nomevariabile2 [= valore2] ... [, nomevariabileN [= valoreN]]];