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Declarning Variable in Introduction of Programming in CPP
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Usage 
Variable is used to allow complier to allocate space for the variables defined within the program.
Types 
* Int
* Float
* Bool
* Char
Int 
Variables is used to represent negative and positive integer values (whole numbers).
Float 
Variables is used to represent any real numeric value include whole numbers and numbers with decimal point. 
Bool 
Variables is used to return true or false values.
Char 
Variables is used to represent a single character.It may be digit, character and any special symbols.
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