What are function expressions in JavaScript?

What are function expressions in JavaScript?

Function expressions are a way to define functions in JavaScript. Unlike function declarations, they can be anonymous and are often used as arguments to other functions.

Can you give me an example of a function expression?

Sure! Here's a simple example: const add = function(a, b) { return a + b; }; This defines a function that adds two numbers.

How is a function expression different from a function declaration?

A function declaration is hoisted, meaning it can be called before it's defined, while a function expression is not hoisted.

When should I use function expressions?

Use function expressions when you need a function as a value, such as when passing it as an argument or returning it from another function.