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  1. 123

    JavaScript provides a variety of methods to manipulate arrays. Here are some of the most commonly used methods:

    Adding and Removing Elements

    push()

    Adds one or more elements to the end of an array and returns the new length of the array.

    const fruits = ["Banana", "Orange", "Apple"];
    fruits.push("Mango"); // ["Banana", "Orange", "Apple", "Mango"]
    Copied!

    pop()

    Removes the last element from an array and returns that element.

    const fruits = ["Banana", "Orange", "Apple"];
    fruits.pop(); // ["Banana", "Orange"]
    Copied!

    unshift()

    Adds one or more elements to the beginning of an array and returns the new length of the array.

    const fruits = ["Banana", "Orange"];
    fruits.unshift("Apple"); // ["Apple", "Banana", "Orange"]
    Copied!

    shift()

    Removes the first element from an array and returns that element.

    const fruits = ["Banana", "Orange", "Apple"];
    fruits.shift(); // ["Orange", "Apple"]
    Copied!

    Iterating Over Arrays

    forEach()

    Executes a provided function once for each array element.

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  2. Sling Academy
    https://www.slingacademy.com › article › javascript...

    JavaScript: 6 Ways to Calculate the Sum of an Array

    This practical, succinct article walks you through three examples that use three different approaches to find the sum of all elements of a given array in Javascript (suppose thi…
    Using Array.Reduce() Method

    If you’re using modern Javascript (ES6 and beyond), this might be the neatest and quickest solution. Example: Output: The reduce()method executes a reducer function for elements of an array. It returns the accumulated result from the last call o…

    Using A Classic For Loop

    This is an easy-to-understand approach and has been used for decades. However, the code is a bit longer. Example: Output:

    Using Modern for/of Loop

    This approach also uses a loop but is more concise than the previous one. Like the Array.reduce() method, for/ofwas added to ES6 (JS 2015). Example: Output:

  3. W3School
    https://www.w3schools.com › js › js_array_methods.asp

    JavaScript Array Methods - W3Schools

    ES2019 added the Array flatMap() method to JavaScript. The flatMap() method first maps all elements of an array and then creates a new array by flattening the array.

    Code sample

    const fruits = ["Banana", "Orange", "Apple", "Mango"];
    document.getElementById("demo").innerHTML = fruits.toString();
  4. Stack Overflow
    https://stackoverflow.com › questions

    How to find the sum of an array of numbers - Stack Overflow

    Dec 13, 2014 · Given an array [1, 2, 3, 4], how can I find the sum of its elements? (In this case, the sum would be 10.) I thought $.each might be useful, but I'm not sure how to implement it.

    • Reviews: 4
    • Mozilla Developer
      https://developer.mozilla.org › ... › Global_Objects › Array

      Array - JavaScript | MDN - MDN Web Docs

      Feb 24, 2026 · The Array object, as with arrays in other programming languages, enables storing a collection of multiple items under a single variable name, and has members for performing common …

    • GeeksForGeeks
      https://www.geeksforgeeks.org › javascript › how-to...

      Sum of an Array in JavaScript - GeeksforGeeks

      Jul 23, 2025 · A basic and straightforward way to sum the elements of an array is by using a for loop. This method iterates through each element in the array, adding it to a cumulative sum.

    • FreeCodecamp
      https://www.freecodecamp.org › news › how-to-add...

      JS Sum of an Array – How to Add the Numbers in a …

      Mar 31, 2023 · An array in JavaScript is an object that allows you to store an ordered collection of multiple values under a single variable name and …

    • expertbeacon.com
      https://expertbeacon.com › js-sum-of-an-array-how-to...

      How to Add the Numbers in a JavaScript Array - Expertbeacon

      Aug 22, 2024 · In this comprehensive guide, you will learn several methods to calculate the sum of all the numbers in a given array using different approaches in JavaScript. Specifically, I will demonstrate …

    • programguru.org
      https://programguru.org › javascript › how-to...

      How to Calculate the Sum of Array Values in JavaScript

      Learn how to calculate the sum of array values in JavaScript using multiple beginner-friendly methods including reduce (), for loop, and forEach (). Includes examples and output.

    • xjavascript.com
      https://www.xjavascript.com › blog › how-to-find-the...

      How to Find the Sum of an Array in JavaScript: Using $.each and …

      Feb 4, 2026 · In this blog, we’ll explore four detailed methods to sum an array in JavaScript: A classic for loop (beginner-friendly). The forEach array method (readable iteration). The reduce method (concise …

    • DEV Community
      https://dev.to › javascript-array-methods-a-complete-guide-to...

      JavaScript Array Methods: A Complete Guide to Map, Filter, and Reduce

      Mar 25, 2026 · * Mastering JavaScript Array Methods: map (), filter (), and reduce () * 1] * Introduction to Arrays in JavaScript * In the world of programming and Data Structures & Algorithms (DSA), Arrays …

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