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

# Introduction

There's one more powerful feature of functions. The return statement. In addition to accepting values in through arguments, a function can send something back out.

Here's how that works.

function add10(number) {
    let newNumber = number + 10;
    return newNumber;
}

let fifteen = add10(5);
console.log(fifteen); // -> 15

## Breakdown

We give `add10` a value of 5 when we call it. Inside the function, a new variable `newNumber` is created, which is equal to what was passed in plus 10.

We then *return* `newNumber` from the function. Pay attention to line 6. We create a new variable `fifteen` and set it equal to the *function call*. When we do this, **the variable receives the value that the function returns**.

Essentially, on line 6, we're telling JavaScript to pause and jump up to line 1 and call `add10` with out parameter. This function will run to completion. When it's done, the value that is returned will be given to the variable `fifteen` and the engine will continue running where it left off.

While a function can accept multiple arguments, it can only return one value.

Learn the last powerful part of functions. The return statement allows a function to send information back out. With this final tool, we can master the full power of functions.

Introduction

Variables

Operators & if-statements

Functions

Arrays

Objects

Loops

Conclusion

Return Statements

Introduction

Breakdown