Accessing array items using index in javascript

Published on : August 13,2022

Hi dev,

In this article we will learn about Accessing array in javascript.

We access each element in an array using their index. An array index starts from 0. The picture below clearly shows the index of each element in the array.

const fruits = ['banana', 'orange', 'mango', 'lemon']
let firstFruit = fruits[0] // we are accessing the first item using its index

console.log(firstFruit) // banana

secondFruit = fruits[1]
console.log(secondFruit) // orange

let lastFruit = fruits[3]
console.log(lastFruit) // lemon
// Last index can be calculated as follows

let lastIndex = fruits.length - 1
lastFruit = fruits[lastIndex]

console.log(lastFruit) // lemon

const numbers = [0, 3.14, 9.81, 37, 98.6, 100] // set of numbers

console.log(numbers.length) // => to know the size of the array, which is 6
console.log(numbers) // -> [0, 3.14, 9.81, 37, 98.6, 100]
console.log(numbers[0]) //  -> 0
console.log(numbers[5]) //  -> 100

let lastIndex = numbers.length - 1
console.log(numbers[lastIndex]) // -> 100

const webTechs = [
  'HTML',
  'CSS',
  'JavaScript',
  'React',
  'Redux',
  'Node',
  'MongoDB',
] // List of web technologies

console.log(webTechs) // all the array items
console.log(webTechs.length) // => to know the size of the array, which is 7
console.log(webTechs[0]) //  -> HTML
console.log(webTechs[6]) //  -> MongoDB

let lastIndex = webTechs.length - 1
console.log(webTechs[lastIndex]) // -> MongoDB

const countries = [
  'Albania',
  'Bolivia',
  'Canada',
  'Denmark',
  'Ethiopia',
  'Finland',
  'Germany',
  'Hungary',
  'Ireland',
  'Japan',
  'Kenya',
] // List of countries

console.log(countries) // -> all countries in array
console.log(countries[0]) //  -> Albania
console.log(countries[10]) //  -> Kenya

let lastIndex = countries.length - 1
console.log(countries[lastIndex]) //  -> Kenya

const shoppingCart = [
  'Milk',
  'Mango',
  'Tomato',
  'Potato',
  'Avocado',
  'Meat',
  'Eggs',
  'Sugar',
] // List of food products

console.log(shoppingCart) // -> all shoppingCart in array
console.log(shoppingCart[0]) //  -> Milk
console.log(shoppingCart[7]) //  -> Sugar

let lastIndex = shoppingCart.length - 1
console.log(shoppingCart[lastIndex]) //  -> Sugar

Hope it can help you…

Categories : JavaScript

Tags : JavaScript

Praful Sangani

I'm a passionate full-stack developer with expertise in PHP, Laravel, Angular, React Js, Vue, Node, Javascript, JQuery, Codeigniter, and Bootstrap. I enjoy sharing my knowledge by writing tutorials and providing tips to others in the industry. I prioritize consistency and hard work, and I always aim to improve my skills to keep up with the latest advancements. As the owner of Open Code Solution, I'm committed to providing high-quality services to help clients achieve their business goals.

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Accessing array items using index in javascript

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