How to check if array is empty?

Problem Statement

given an array, write a JavaScript program to check if the array is empty

Solution

an array is empty if there are no elements in it. if there are no elements in array, then the length of such array would be 0. so, to check if an array is empty, we have to check if the length of the given array is 0. to get the length of the array, we can use Array.length property, and to compare this length with 0, we can use comparison equal-to operator

Program

1. given an array fruits. check if array fruits is empty

let fruits = [];
if ( fruits.length == 0 ) {
    console.log('empty array');
} else {
    console.log('not an empty array');
}

if-block must run

2. take some elements in fruits array and check the output

let fruits = ['apple', 'banana', 'mango'];
if ( fruits.length == 0 ) {
    console.log('empty array');
} else {
    console.log('not an empty array');
}

else-block must run

JavaScript Code