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 do function expressions differ from function declarations?

Function declarations are hoisted, meaning they can be called before they are defined, while function expressions are not hoisted.

When should I use function expressions instead of declarations?

Use function expressions when you need a function as a value, like passing it as an argument or defining it within another function.