What is a Variable?

What is a variable?

Variable is a name given to a memory location.Variable will be having a memory address value

For eg:-

int iNum1

char cName

float fNum etc..

Here, int,char,float represents the Data type to be used and iNum1,cName,fNum are the variable names given for those DataTypes.

Rules For Declaring a Variables :-
1. A Variable name Should Start with an Alphabet.
2. Key Words representing the program should not be used as variable name.
for eg: numeric, int, console etc.. should not be used.
3. Special characters except an underscore( _ ) are not allowed.

4. Variable names should not start with a number.