Variable in C Programming

Variable in C Programming

Variable in C programming language is a container that store the data.Variable  has two part. One part is data type and another part is name of the variable.That mean each variable has a type and a  name.

For example :

int banana;    

[ In this statement of c there is a variable declaration. Here “int” is data type and  “banana” is the name of variable]

You may have question now what is data type?

A data type represents a type I mean classification of the data which you can process using your computer program. It can be numeric,alphanumeric,decimal etc

Now I am going to introduce you general built in data type table in c language with explanation

Type	Description	Value
Char	Character type data use single quotation around characters	'a', 'l', 'm', 'F' etc.
int	Natural number integer type	….-1,100,2,19…… etc
float	Numeric type that has either fractional form or exponent form	-5.0 0.000234 -0.42E-5
double	Implies, a double has 2x the precision of float	15436059087.21
void	It represents the absence of type

Variable Type in C programming:

There are two type of variable in c programming language

     1) local variable

     2) global variable

What does mean global variable in c:

Global variables are defined outside of a function,usually on top of the program. The global variables will hold their value throughout the life time  of your program. They can be accessed by any function.That mean a global variable is available for use througout your entire program after its declaration.

What does mean local variable in C:

Local variable is a variable have a local scope.Local variable is accessible only from function or block in which it is declared.

Variable declaration in c:


int main()
{
int IntegerVariable;
int CharacterVariable;
return 0;
}

It is possible to declare more than one variable at the same time?
Answer :Yes like below

int main()

{

int variable1, variable2, varibale3;

int abc, def, mmm;

return 0;

}

It is possible to declare a variable and assign a value  at the same time?

Answer:Yes like below

int main()

{

int ivar;

                int ivar = 10;

return 0;

}

Const Type Variable declaration

      int main()

{

const float PI = 3.14;

char = 'A';

return 0;

}

int main()
 {
  const float PI = 3.14;
  char = 'A';
  return 0;
 }