Question 3: Write a program in whatever language you like that solves for the factorial of a number.

Question

JG · Accepted Answer

import java.util.Scanner;
 
class Factorial
{
   public static void main(String args[])
   {
      int n, c, fact = 1;
 
      System.out.println("Enter an integer to calculate it's factorial");
      Scanner in = new Scanner(System.in);
 
      n = in.nextInt();
 
      if ( n < 0 )
         System.out.println("Number should be non-negative.");
      else
      {
         for ( c = 1 ; c <= n ; c++ )
            fact = fact*c;
 
         System.out.println("Factorial of "+n+" is = "+fact);
      }
   }
}

AA · Answer

Fortran      program fact

      integer ans,num

      print*, 'Enter an integer to find its factorial'
      read(*,*)num
      if(num.lt.0) stop
      ans = rec(num)
      write(*,*)ans

      end program

      recursive function rec(n) result(f)

      integer,intent(in):: n
      integer f
      
      if(n.eq.0) then 
      f=1
      else
      f = n*rec(n-1)
      endif

      end function

Sigiloso · Answer

My example was not great. I suggested looking online for more sophisticated answers

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