Functions are defined with the function keyword: followed by the function name followed by parentheses ( ) followed by brackets { } The function name follows the naming rules for …

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 …

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

Sep 13, 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 …

A function expression is a way to store functions in variables. In this tutorial, you will learn about JavaScript functions and function expressions with the help of examples.

In JavaScript, a function can be defined using the function keyword, followed by the name of a function and parentheses. Optionally, a list of input parameters can be included within the …

Oct 14, 2022 · We’ve already seen examples of built-in functions, like alert(message), prompt(message, default) and confirm(question). But we can create functions of our own as …

JavaScript functions are reusable blocks of code that perform a specific task, taking some form of input and returning an output. To define a function, you must use the function keyword, …

JavaScript functions are defined with the function keyword. You can use a function declaration or a function expression. Earlier in this tutorial, you learned that functions are declared with the …

Mar 31, 2024 · Functions are thought of as "first class" objects, meaning that despite their unique behavior, they can be used in all the same contexts as any other JavaScript object. For …