A constant or a literal is a data item its value doe not change during execution.
1) Integer literals: Whole numbers without fractional parts are known as integer literals, its value does not change during execution. There are 3 types decimal, octal and hexadecimal.
Eg. For decimal 100,150,etc
For octal 0100, (5240, etc For hexadecimal 0x100, 0x1A,etc
2) Float literals: A number with fractional parts and its value does not change during execution is called floating point literals.
Eg. 3,14157,79.78,etc
3) Character literal: A valid C++ character enclosed in single
