C Variables

Variables are used as holders of data values.

In C, variables are classified into different types:

• int: An integer variable can hold only an integer.
• float: A floating-point variable can hold only floating-point numbers.
• char: A character variable can hold a character only.

Variable Declaration

Variable declaration is the act of defining the name and type of a variable prior to its use in the program.
Syntax:

Rules for Naming Variables

We can name the variable anything provided that it complies with the rules below:

• A variable name should consist of letters, numbers, and underscores.
• A variable may not begin with a digit.
• A variable name cannot have any white space in it.