What is a function declaration in JavaScript?

What is a function declaration in JavaScript?

A function declaration is a way to define a function in JavaScript using the function keyword, followed by a name and parentheses.

Can you give me an example of a function declaration?

Sure! Here's a simple example:

function greet() {
    console.log('Hello, world!');
}

How do I call this function after declaring it?

You can call the function by simply using its name followed by parentheses:

greet(); // This will output 'Hello, world!'

What are the differences between function declarations and function expressions?

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