how to add array inside array in javascript code example

Example 1: push array javascript

let array = ["A", "B"];
let variable = "what you want to add";

//Add the variable to the end of the array
array.push(variable);

//===========================
console.log(array);
//output =>
//["A", "B", "what you want to add"]

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