Constants in C

Constants:

A quantity whose value cant be changed during the execution of a program.

  e.g

  10,5.5,’a’ etc 

 Four Types of Constants:

1. Integer Constant

2.Floating point constant 
3.Character constant 
4.String Constant


Integer Constant:
 Numerical value without the decimal part.

  e.g

  562,2,-4,0

Floating point/Real constant:

Numerical values that have integral as well as decimal part.

  e.g

  -5.6,2.3,4.6,0.0 etc

 Character Constant:

  1. A single character enclosed in single quotation marks.

  2.Character can be alphabet, digit or special characters.

  e.g

  ‘s’,’b’,’+’,’1’,’$’,’&’

 String Constant:

A number of characters(alphabets, digits or special characters) enclosed in double quotation marks.

  e.g

  “Pakistan”, “Newyork”, “abc_123” etc