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  1. JavaScript Functions - W3Schools

    A JavaScript function is a block of code designed to perform a particular task. A JavaScript function is executed when "something" invokes it (calls it).

  2. Functions - JavaScript | MDN

    Jul 8, 2025 · A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some …

  3. Functions in JavaScript - GeeksforGeeks

    Jun 28, 2025 · Functions in JavaScript are reusable blocks of code designed to perform specific tasks. They allow you to organize, reuse, and modularize code. It can take inputs, perform …

  4. JavaScript Functions

    This tutorial introduces you to JavaScript functions that structure your code into smaller reusable units.

  5. Functions - The Modern JavaScript Tutorial

    Oct 14, 2022 · Functions are the main “building blocks” of the program. They allow the code to be called many times without repetition. We’ve already seen examples of built-in functions, like …

  6. JavaScript Function and Function Expressions (with Examples)

    A function is an independent block of code that performs a specific task. A function expression is a way to store functions in variables. In this tutorial, you will learn about JavaScript functions and …

  7. JavaScript Functions: From Basics to Advanced

    Learn what are functions in JavaScript. Explore the basics of functions in JavaScript, including anonymous and arrow functions, and learn how to organize your code using functions.

  8. What are Functions in JavaScript? A Beginner's Guide

    Jun 30, 2022 · In this article, you learned what functions in JavaScript are all about and how you can write your own functions. With functions, you can organize your code by grouping …

  9. Javascript Functions - Javascript Cheatsheet

    A function in JavaScript is a ... of statements that performs a task or calculates a value ...To use a function, you must define it somewhere in the scope from which you wish to call it.

  10. Function - JavaScript | MDN - MDN Web Docs

    6 days ago · The Function object provides methods for functions. In JavaScript, every function is actually a Function object.

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