​C tutorials #7

C variables

A variable is nothing but a name given to a storage area that our programs can manipulate. Each variable in C has a specific type, which determines the size and layout of the variable's memory; the range of values that can be stored within that memory; and the set of operations that can be applied to the variable.

The name of a variable can be composed of letters, digits, and the underscore character. It must begin with either a letter or an underscore. Upper and lowercase letters are distinct because C is case-sensitive. There will be the following basic variable types −

Type & Description

1 - char
Typically a single octet(one byte). This is an integer type.

2 - int
The most natural size of integer for the machine.

3  - float
A single-precision floating point value.

4  - double
A double-precision floating point value.

5 - void
Represents the absence of type.

C programming language also allows to define various other types of variables, which we will cover in subsequent tutorials like Enumeration, Pointer, Array, Structure, Union, etc.