Variables in C Programming Language

C Programming Tutorial

C Variables

In C Programming a variable is a place to store information. A variable is a location in your computer’s memory in which you can store a value and from which you can later retrieve that value.

Variables are referential name given to memory location holding our program data. The value of the C variable may get change in the program.

Rules For Declare C Variables


 Variable name must begin with letter or underscore.

 Variable name sholud not start with a digit.

 They can be constructed with digits, letters.

 sum, height, _value are some examples for variable name

 No special symbols are allowed other than underscore.

 Variables are case sensitive

Blank or spaces are not allowed in variable name.

Syntax to declare variables in C programming

< data-type > < variable-name>
int num;

You can also declare more than one variable of same type at once using comma.

< data-type > < variable-name 1>, < variable-name 2>,< variable-name 3>, … , < variable-name N>,;

int num, name, sum;