Constants

Constants refer to fixed values that don’t change the execution of program.

a) Numeric constants:- 

Refer to a set of digits/sequel of digits. 

They are 2 types. 

1. Integer constants:- 

They are 0 -9 proceeded by an optional + or – sign. Integers are not allowed decimal points. 

Ex:- 30,15,-20,-45 

2. Real constants:- 

They are shown in decimal notation having whole numbers fallowed by a decimal point & the fractional port. 

Ex:- 40.00, 22.33, -0.9402 

b) Character constants:- 

They are 2 types

1. Single :- 

A single character constant contains a single char enclosed in a pair of single quote marks. 

Ex:- ‘a’ , ‘t’, ‘g’ , ‘,’ , ‘?’ . 

2. String:- 

A string constant is a sequence of character enclosed in double quotes. The characters may be letters, numbers, special characters & so on. 

Ex:- “prasad” , “123”, “-+” .