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Chapter 1

Basic JavaScript and Graphics

1.3 Variables

What Are Variables?

Declaring vs. Initializing

Using Variables

Types of Variables

Variable Type Examples

Naming Variables

Keywords

Check Your Understanding

  1. Invalid Answer

Exercise: Daily Activities

Vocabulary

Term Definition
Boolean A boolean is a true or false value.
Declare a Variable Declaring a variable is defining it for the first time.
Variable A symbol or container that holds a value.
Integer A whole number (not a fraction)
String A sequence of characters
Initialize a Variable Initializing a variable is giving it an initial value.
Float A float, or floating point value, is a numeric value that can have decimal level precision (ex: 3.14)