**Description of this program :**

This Java programming will teach you the methods for writing program to calculate factorial of any given number. First of all define a class "Factorial" under the Java util package. Java util package has a Scanner is used for reading the input .
Take an integer variable as fact=1 and insert the message in the System method.
Now applying for loop with conditions as integer i=1(intializer), i<=x and i++ as increment operator. So output result will be like fact=fact*i.

**Java version of this program is given bellow :**

package power; import java.util.Scanner; /** * * @author ACHCHUTHAN */ public class Factorial { int x; public Factorial() { Scanner input = new Scanner(System.in); System.out.println("Enter the Factorial Number :"); x = input.nextInt(); } public int getX() { return x; } public int getFact() { if (x == 0) { return 1; } else { int fact = 1; for (int i = 1; i <= x; i++) { fact = fact * i; } return fact; } } public static void main(String args[]) { Factorial a = new Factorial(); System.out.println(a.getX() + " " + "Factorial is = " + a.getFact()); } }

**Output of this program :**

run:

Enter the Factorial Number :

10

10 Factorial is = 3628800

BUILD SUCCESSFUL (total time: 3 seconds)

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