****Constants**** are entities that remain unchanged throughout the program once they have been declared. Pascal allows the declaration of the following types of constants:




# Example
The following example shows the use of constants:

program pay_calculation (input,output);
const
tax_deduction = 10000;
bonus = 50000;
basic_pay = 40000;

var
total_pay, final_pay : real;   

begin
   
   total_pay := basic_pay + bonus;
   final_pay := total_pay - tax_deduction;
   
   writeln('The final pay is ',final_pay);
end.

pascal

pascal.tar.gz

What are constants in Pascal?

Constants are entities that remain unchanged throughout the program once they have been declared. Pascal allows the declaration of the following types of constants: 

Constant Type	Example
Ordinal (Integer)	no_of_employes = 250;
Character	Operator = ‘&’ ;
String	country = ‘Pakistan’;
Set	provinces = ( Punjab, Sindh, Baluchistan, KPK, Gilgit);
Pointer	thisPointer = NIL;

What are constants in Pascal?

Declaring constants

Example