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).

May 27, 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 input and return an output where there is some obvious relationship between the …

May 14, 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 actions, and return outputs.

Oct 14, 2022 · A function is an action, so function names are usually verbal. There exist many well-known function prefixes like create… , show… , get… , check… and so on. Use them to hint what a function does.

Summary: in this tutorial, you will learn about JavaScript functions and how to use them to structure the code into smaller and more reusable units. Introduction to JavaScript functions. When developing an application, you often need to perform the same action in many places. For example, you may want to show a message whenever an error occurs.

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 function expressions with the help of examples.

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 everything into separate blocks that perform different tasks.

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 example, a function can be assigned to a variable, passed as an argument to other functions, and returned by other functions.

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.

Jul 15, 2024 · The Function object provides methods for functions. In JavaScript, every function is actually a Function object.