What are function expressions in JavaScript ES6?

What are function expressions in JavaScript ES6?

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

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 and assigns it to the variable add.

What’s the difference between function expressions and function declarations?

The main difference is that function declarations are hoisted, meaning they can be called before they are defined, while function expressions are not hoisted.

Are there any advantages to using function expressions?

Yes, function expressions can be used to create closures, and they can also be passed as arguments to other functions, making them very versatile.