Variable types in C programming

Variable

A variable is nothing but a name given to a storage area that our programs can manipulate. Each  variable  in  C  has  a  specific  type, which  determines  the  size and  layout  of  the variable's memory;  the  range  of  values  that  can  be  stored within  that  memory;  and the  set  of  operations  that  can  be  applied  to  the variable. The name of a variable can be composed of  letters, digits, and  the underscore character.  It  must  begin  with  either  a letter  or  an  underscore.  Upper  and lowercase  letters  are  distinct  because  C  is  case-sensitive.  

Example :-Variable Declaration in C