Please enable JavaScript to use CodeHS

Intro to JavaScript Textbook

1. Basic JavaScript and Graphics

2. JavaScript Control Structures

2.1 Booleans

2.2 Logical Operators

2.3 Comparison Operators

2.4 If Statements

2.5 For Loops

2.6 Random Numbers

2.7 While Loops

While Loop In Action

While Loop Countdown

While Loops with User Input

Beware of Infinite Loops

Check Your Understanding

Exercise: Inventory

2.8 Loop and a Half

2.9 Functions and Parameters

2.10 Functions and Return Values

2.11 Local Variables and Scope

3. Animation and Games

4. Basic Data Structures

Chapter 2

JavaScript Control Structures

2.7 While Loops

While Loop In Action

While Loop Countdown

While Loops with User Input

Beware of Infinite Loops

Check Your Understanding

  1. Incorrect Correct No Answer was selected Invalid Answer

Exercise: Inventory

Vocabulary

Term Definition
Loop A loop is a way to repeat code in your program.
While Loop Lets us repeat code as long as something is true.
Condition A condition is code that you put inside an if statement or while-loop.
Control Structure A control structure lets us change the flow of the code.
Edge Case An edge case is a problem in your code that only occurs in extreme situations.
Fencepost Problem A problem when using a while loop where you forget one action at the beginning or the end.
Counter A variable used to count the number of times an action has been performed
Iterate A single run through the instructions contained a loop