Variables in C

A variable is a name of the memory location. It is used to store data. Its value can be changed, and it can be reused many times.

It is a way to represent memory location through symbol so that it can be easily identified.

Let's see the syntax to declare a variable:

·       int a; 

·       float b; 

·       char c;

int a=10, b=20;      //declaring 2 variable of integer type 

float f=20.8; 

char c='A'; 

Valid variable names:

int a; 

int _ab; 

int a30;

Invalid variable names:

int 2; 

int a b; 

int long; 

Types of Variables in C:

·       local variable

·       global variable

·       static variable

·       automatic variable

·       external variable