JavaScript Functions

A JavaScript function is a block of code that you can name once and run whenever you need it.

Instead of writing the same lines again and again, you put them inside a function and call the function by its name.

A function only runs when something calls it.

Example

function greet() {
  console.log("Hello");
}

greet();

In this example, the function is named greet.

Nothing is printed until greet() is called on the last line.

What is a Function?

A function is a named block of code that performs one job.