Factorial in Turbo Pascal

A simple program that I wrote using Turbo Pascal for Windows to accept an integer value from the user and then our program will compute the factorial value of the given number by the user.


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 Sample Program Output

Program Listing

Program Factorial_Program;

Uses WinCrt;


Var

   Fact : Longint;
   n    : Integer;

Function Factorial(n : integer) : longint;
Begin
 If N < 1 then
   Begin
   factorial := 1;
   End
 Else
   Factorial := n * factorial(n-1);
End;

Begin
 Clrscr;
 Write('Factorial Program in Turbo Pascal');
 writeln;
 Writeln;
 Write('Enter a Number : ');
 Readln(n);
 fact := factorial(n);
 writeln;
 Writeln('The factorial of ',n:1,' = ',fact,'.');
 Readln;
End.