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  1. JavaScript Functions - W3Schools

    A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses (). Function names can contain letters, digits, underscores, and dollar signs …

  2. Functions - JavaScript | MDN

    Jul 8, 2025 · Functions are one of the fundamental building blocks in JavaScript. A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a …

  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

    Summary Use the function keyword to declare a function. Use the functionName() to call a function. All functions implicitly return undefined if they don’t explicitly return a value. Use the …

  5. 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 …

  6. 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.

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

    Jun 30, 2022 · By Chinwendu Enyinna Functions are one of the fundamental concepts in programming. They let us write concise, modular, reusable, and maintainable code. They also …

  8. Javascript Functions - Javascript Cheatsheet

    A function is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reusing. …

  9. JavaScript Function Definitions - W3Schools

    JavaScript functions are defined with the function keyword. You can use a function declaration or a function expression.

  10. Functions in JavaScript | ProCoding

    Functions are one of the foundational building blocks in JavaScript, allowing developers to organize, reuse, and structure their code effectively. A function is a block of code designed to …