How to Populate a JavaScript Array?

There are several ways to populate a JavaScript array:

1. Add elements one by one using the array’s push() method:

let myArray = [];
myArray.push("element1");
myArray.push("element2");

2. Use an array literal to define the elements when creating the array:

let myArray = ["element1", "element2"];

3. Use a loop to add elements to the array:

let myArray = [];
for (let i = 0; i < 5; i++) {
  myArray.push("element" + i);
}

4. Use the array’s splice() method to insert new elements at a specific index:

let myArray = ["element1", "element3"];
myArray.splice(1, 0, "element2");

This will insert “element2” at index 1 of the array.

5. Use the array’s concat() method to merge two or more arrays:

let myArray1 = ["element1", "element2"];
let myArray2 = ["element3", "element4"];
let myArray = myArray1.concat(myArray2);