2. Values and Variables (Single Pieces of Data)

This chapter introduces some fundamental concepts in programming. “Values” are the pieces data that programs operate on, and “variables” are how you store and manipulate them in your code.

• 2.1. Values and Data Types
  • 2.1.1. Strings
  • 2.1.2. Numbers
  • 2.1.3. Type Conversion Functions
• 2.2. Variables
  • 2.2.1. Variable Assignment
  • 2.2.2. Variable Names and Keywords
  • 2.2.3. Choosing Good Variable Names
• 2.3. Expressions
• 2.4. Operators and Operands
  • 2.4.1. Divison
  • 2.4.2. Modulus
  • 2.4.3. Example
  • 2.4.4. String Operations
  • 2.4.5. Table of Operators
• 2.5. Input
• 2.6. Updating Variables
• 2.7. Good Coding Practices: Comments
• 2.8. Word Count Example Program (Again)
• 2.9. Glossary