Variable

Variable In C Language

Variable is used to store data. Variable is the name of the memory location .

let's see the syntax of declaration of variable:

Syntax: variable_type variable_name

Example:

  

int y;

char ch;

float per;

In Above example int, char, float are the datatype and y, ch, per is the name of variable.

We can also provide value while we declare the varable as show below:

int y=10;

char ch='B';

float a=10.5, b=5.5;//Declaring 2 variable of float type

Rules of  Declaring The Variable:

1. Variable  can have only aphabate and unerscore.
2. Variable can not start with digit.
3. White space is not allowed while you declaring the variable.

Valid Variable Name:

Invalid Variable Name:

Types Of  Variable In C language:

1.Local Variable :

local variable declare inside of the function.

2.Global Variable:

 

A global variable declare outside of the function.

3.Static Variable:

Static means unchanged. A Variable declare with static keyword is called static variable.