Gain insights into JavaScript fundamentals. Delve into variables, operators, functions, arrays, objects, and loops. Discover essential concepts to advance further in your coding journey with this beginner-friendly course.

This is an introduction to JavaScript for the complete beginner. It'll provide the fundamentals of the language. Topics include variables, operators, functions, arrays, objects, and loops. After this course, you should be ready to further your learning through advanced courses or other resources.

There is NO installation required for this course. Code can be viewed and run directly from the lessons.

This course has been created by Arnav Aggarwal, a full-stack engineer. Arnav has attended a coding boot camp and has taught at another one. He has extensive experience understanding how people learn to code. In under a month, Arnav's published articles on JavaScript concepts have received over 50,000 views and have been featured on Medium.com and code mentor.io due to their value.

After this course, check out the next one in the series.

Step Up Your JS: A Comprehensive Guide to Intermediate JavaScript

https://goo.gl/GjM8Mu

Introduction to JavaScript: First Steps

We now get to one of the topics that new programmers find most difficult. Once the understanding sinks in, however, it'll feel trivial. You'll write functions pretty much every single day that you write code.

Let's show some code and then discuss what's happening.

function myFirstFunction() {
    console.log('Just ran my first function!');
}

myFirstFunction(); // -> Just ran my first function!

# Creating a Function

To write a function, we start with the `function` keyword. We write the name we want to give the function after it. We write a pair of parentheses after that.

    function functionName()

Function naming rules are the same as variable naming rules. Once we create a function, the function name can be treated like a normal variable.

We then write a pair of curly brackets `{}`. Inside these curly brackets, we put some code. The code inside those brackets is called the **function body**.

    function functionName() {
    		// function body
        // some code here
    }

When the engine is running our code, nothing inside the function body runs until we do something special. If all we have in a file is the function `myFirstFunction` from above, nothing will happen. See for yourself.

Learn one of the fundamental building blocks of all languages: functions. Learn how to write a function, why they're useful, and what we can do with them.

Introduction

Variables

Operators & if-statements

Functions

Arrays

Objects

Loops

Conclusion

Introduction to Functions

Creating a Function