What is a function expression in JavaScript?

Can you explain what a function expression is in JavaScript?

Sure! A function expression is a way to define a function in JavaScript. Unlike function declarations, function expressions can be anonymous and are often used as arguments to other functions.

Can you give me an example of a function expression?

Of course! Here's a simple example:

const greet = function(name) {
    return `Hello, ${name}!`;
};

In this case, greet is a function expression that takes a parameter name.

How is it different from a function declaration?

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

Are there any use cases where function expressions are preferred?

Yes! Function expressions are often used in callbacks, closures, and when you want to create functions dynamically.