JavaScript Functions Course (How To)

JavaScript functions let you create reusable chunks of code. They make programming faster, easier, and less error-prone. They are also one of the essential concepts in JavaScript programming.

Create Reusable Code with Functions

Functions are at the heart of JavaScript. They let you write code that you can quickly use again and again.

Chevron 8 steps

• Introducing Functions in JavaScript

  4:08

• Introducing Functions Review

  5 questions

• Create and Call a Function

  4:57

• Creating a Function

  3 objectives

• Return a Value from a Function

  4:32

• Return a Value from a Function

  3 objectives

• Using Multiple return Statements

  6:58

• Function Return Values Review

  5 questions

Pass Information Into Functions

Functions often need specific information to perform a task. In addition to getting information from a function, you can also send information to a function to change how that function works.

Chevron 8 steps

• Function Parameters and Arguments

  4:48

• Pass an Argument to a Function

  3 objectives

• Pass Multiple Arguments to a Function

  4:32

• Parameters and Arguments Review

  5 questions

• Create a max() Function

  2 objectives

• Variable Scope

  7:01

• Function Declarations vs. Function Expressions

  4:29

• Scope and Function Expressions Review

  7 questions

Arrow Functions

Learn how arrow functions provide a more concise syntax for writing functions.

Chevron 10 steps

• Create Functions Using Arrow Syntax

  4:34

• instruction

  Concise Arrow Function Syntax

• Arrow Functions Review

  5 questions

• Default Function Parameters

  5:11

• Create an Arrow Function

  1 objective

• instruction

  Descriptive Comments for Functions

• Function Challenge

  1:24

• Function Challenge Solution

  4:28

• Testing for Number Arguments

  4:02

• JavaScript Functions Review

  6 questions