5 Data Types, Operations, and Expressions

Variables and constants are the basic data objects in a C program. Declarations list the variables to be used, state what type they are, and may set their initial value. Operators specify what is to be done to them. Expressions combine variables and constants to create new values.

• 5.1 Variable Names
• 5.2 Data Types
  • 16-bit Integers
  • 32-bit Integers
  • 32-bit Floating Point Numbers
  • 8-bit Characters
• 5.3 Local and Global Variables
  • 5.3.1 Variable Initialization
  • 5.3.2 Persistent Global Variables
• 5.4 Constants
  • 5.4.1 Integers
  • 5.4.2 Long Integers
  • 5.4.3 Floating Point Numbers
  • 5.4.4 Characters and Character Strings
• 5.5 Operators
  • 5.5.1 Integers
  • 5.5.2 Long Integers
  • 5.5.3 Floating Point Numbers
  • 5.5.4 Characters
• 5.6 Assignment Operators and Expressions
• 5.7 Increment and Decrement Operators
• 5.8 Precedence and Order of Evaluation