how to use variable in push javascript code example

Example 1: js push array

var array = [];
var element = "anything you want in the array";
array.push(element); // array = [ "anything you want in the array" ]

Example 2: array.push

var vegetables = ['Capsicum',' Carrot','Cucumber','Onion'];
vegetables.push('Okra');
//expected output ['Capsicum',' Carrot','Cucumber','Onion','Okra']; 
// .push adds a thing at the last of an array