C Programming Lectures...Introducing Variables....

Introducing Variables......
Entity whose value changes during the execution of a program.We can use variables to represent Constants, Functions, Arrays & the Names of Files.Variable names can be like this..........age, name, address, marks, area, calculator  etc.
Note-
While providing variable names please  follow given instructions...

1. Use alphabet or Underscore( _ ) as the 1st character.
2. Do not use commas, blank spaces, keywords & special characters.

Examples-

name

age

ANNUAL_SALARY

net_salary_2014

area_of_square

Declaring Variables-

Syntax(Rule)

data_type variable_list; (Followed by semicolon)

Example-

char name;

int  age;

double  ANNUAL_SALARY;

float  net_salary_2014;

int  area_of_square;

Initializing Variables-

Syntax(Rule)

data_type variable_name=value;

Example-

int age=25;

char name='Y';