Variable and Types With Example

• Variables:-
• Variable refers to a storage area whose contents can vary during processing. All the variables are created in the memory of the computer. The data store can change during the execution of the programs.
  • The variables name have the following properties:-
  • i) Any variables name may be up to 40 character long
  • ii) Can’t contain characters other than letter, number and types of declaration character ($, %, #, & and ?)
  • iii) Variable name must began with a letter (A-Z a-z (i.e. lowercase or uppercase letter).)
  • iv) Can’t be reserved word like INPUT,
  • v) Variable name represent either numeric values or strings.
  • vi) Can’t began with “FN” unless it is a function call.
  • Types of Variable
  • a) Numeric Variable
  • b) String Variable

• a) Numeric variable:-
• Numeric Variables can be any single letter of alphabetic followed by one of the numerals. 
  Example:- 
  A=12 
  pi=3.14 
  c=79.89

• b) String Variable:-
• String Variables had the string of character or alpha numeric its value. It must began with an alphabets and with dollar ($) sign. Mathematical calculation can’t be performed using string variables. Some of valid string variables are:-
  Sarita $
  Pritam$
  Sarmila$
  TL$
  A$
  B$