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).

Mar 22, 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 …

Apr 15, 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.

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

When calling a function, JavaScript executes the code inside the function body. For example, the following shows how to call the say() function: say( 'Hello' ); Code language: JavaScript ( javascript )

JavaScript References. W3Schools maintains a complete JavaScript reference, including all HTML and browser objects. The reference contains examples for all properties, methods and events, and is continuously updated according to the …

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.

Jul 11, 2024 · JavaScript Function Examples A function in JavaScript is a set of statements that perform a specific task. It takes inputs, and performs computation, and produces output.

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