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

# Refactoring our Code

For-loops are one of the few places with a single letter name is acceptable. Instead of `index`, it's common practice to use `i` or `j`. Let's refactor our code from the previous lesson.

for(let i = 0; i < 10; i = i + 1) {
    console.log(i);
}

It's also common to see `i = i + 1` written another way: `i++`. This is a shorthand built into the language. It means "add one to this variable's value". So `i = i + 1` is completely equivalent to `i++`.

Similarly, `i--` means `i = i - 1`.

Learn how to repeat a set of code as many times as you like, without using functions. For-loops are a fundamental part of every programming language. We'll see how to write them and how to use them with arrays.

Introduction

Variables

Operators & if-statements

Functions

Arrays

Objects

Loops

Conclusion

for-loops, continued

Refactoring our Code