Data Types

The type of data that can be processed through the programming language 'C' are classified as follows

Literal
    A literal is a value that is used in the program.

Numeric literals:

All numeric literals should not contains any special characters or space.

It can be positive or negative.

Decimal

·         A decimal literal should start with numbers other than ‘0’

·         It should contain only numbers

Eg:- 1234 , +248, -198

Wrong:- 03230

Hexa-Decimals

·         Should start with ‘0x’

·         Should contain only hexa decimal numbers ( 0 -9, A,B, C,D,E,F)

Eg:- 0x1234, +0xFACE, -0x23BAD
Wrong: 0xHEAD

Octal

·         Should start with ‘0’

·          Should contain only Octal numbers (0-7)

Eg: - 0123, +0777, -0674

Wrong: 0896, 08AB, 0128

Real literals

·         Should contain only numbers and one decimal point.

          

Non Numeric literals:

Non numeric constant is of two type  i) character ii) escape characters iii) String

 Character:-

The character literal are expressed with in a single quotation in ‘C’ language. Only one character is allowed within the quotation. The character can be any ascii character.

Eg:- ‘A’, ‘a’, ‘+’, ‘.’, ‘1’,  

Wrong: ‘abc’, ‘1.0’