Learning JavaScript Data Structures and Algorithms

Functions

Functions are very important when working with JavaScript. We will also use functions a lot in our examples.

The following code demonstrates the basic syntax of a function. It does not have arguments or the return statement:

function sayHello() {
    console.log('Hello!');
}

To call this code, we simply use the following call:

sayHello();

We can also pass arguments to a function. Arguments are variables with which a function is supposed to do something. The following code demonstrates how to use arguments with functions:

function output(text) {
    console.log(text);
}

To use this function, we can use the following code:

output('Hello!');

You can use as many arguments as you like, as follows:

output('Hello!', 'Other text');

In this case, only the first ...