Sunday, January 15, 2012

Factorial Program in Java Using Class

It is a factorial program in java using class and method.
Public class is fact_main where main method is defined. Another class Factorial where fact method is defined.

Aim: Write a java program to calculate factorial of a number using class concept

Java Program Code
import java.util.*;
class Factorial
{
 private int i=1; 
 public int fact(int n)
 { 
  while(n>0)
  {
   i=i*n; 
   n--;
  }
  return i;
 }
}

public class fact_main
{
 public static void main(String[] args)
 {
  Factorial fact1=new Factorial();
  Scanner object1= new Scanner(System.in);
  System.out.println("******** FACTORIAL PROGRAM ********");
  System.out.print("Enter number to find factorial: ");
  int num=object1.nextInt();
  int k=fact1.fact(num);
  System.out.println("Factorial of "+num+" is:  "+k);
 }
}

Output
Program name: fact_main.java






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