Node.js push() function

push() is an array function from Node.js that is used to add elements to the end of an array. 

Syntax:

array_name.push(element)

Parameter: This function takes a parameter that has to be added to the array. It can take multiple elements also. 

Return type: The function returns the array after adding the element. The program below demonstrates the working of the function: 

Program 1:

javascript

function PUSH() {
    arr.push(2);
    console.log(arr);
}
const arr = [12, 3, 4, 6, 7, 11];
PUSH();

Output:

[ 12,  3, 4, 6, 7, 11, 2]

Program 2:

javascript

function addLang() {
    arr.push('DS', 'Algo', 'JavaScript');
    console.log(arr);
}
const arr = ['NodeJs'];
addLang();

Output:

[ 'NodeJs', 'DS', 'Algo', 'JavaScript' ]

Program 3:

javascript

const Lang = ['java', 'c', 'python'];

console.log(Lang);
// expected output: Array [ 'java', 'c', 'python' ]

Lang.push('node');

console.log(Lang);
// expected output: Array [ 'java', 'c', 'python', 'node' ]

Output:

[ 'java', 'c', 'python' ]
[ 'java', 'c', 'python', 'node' ]