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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

2.8 Loop and a Half

The Infinite Loop

The Break Statement

The Sentinel

Adding Up Numbers

Check Your Understanding

Exercise: Double Sixes

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

2.8 Loop and a Half

The Infinite Loop

The Break Statement

The Sentinel

Adding Up Numbers

Check Your Understanding

  1. Incorrect Correct No Answer was selected Invalid Answer

Exercise: Double Sixes

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.
Sentinel A constant that has the specific purpose of being the value that breaks out of a loop.
Control Structure A control structure lets us change the flow of the code.
Loop-and-a-half A loop, most often set with while(true), that has a break in the loop body.
break statement The `break;` statement breaks out of the current loop, without executing any more code in the loop.
Infinite Loop A loop that has no way of stopping, and will keep looping forever.