Java Factorial Program Example

Program that will be display Factorial  Number

Method 1:

class factorial

{

public static void main(String args[])

{

int fact=1,n=5;

for(int i=1;i<=n;i++)

{

fact = fact*i;

}

System.out.println("Factorial  "+n+" Number Is  = "+fact);

}

}

Output

Factorial 5 Number Is = 120

Method 2:

class factorial

{

public static void main(String args[])

{

int fact=1,n=5;

int i=1;

while(i<=n)

{

fact=fact*i;

i++;

}

System.out.println("Factorial "+n+" Number Is = "+fact);

}

}

Output 

Factorial 5 Number Is = 120

Method 3

class factorial

{

public static void main(String args[])

{

int fact=1,n=5;

int i=1;

do

{

fact = fact*i;

i++;

}while(i<=n);

System.out.println("Factorial "+n+" Number Is = "+fact);

}

}

Output 

Factorial 5 Number Is = 120

Method 4

import java.util.*;

class factorial

{

public static void main(String args[])

{

int fact=1,n;

int i=1;

Scanner in = new Scanner(System.in);

System.out.print("Enter Factorial Number ==> ");

n = in.nextInt();

for(i=1;i<=n;i++)

{

fact = fact*i;

}

System.out.println("Factorial "+n+" Number Is = "+fact);

}

}

Output 

Enter Factorial Number ==> 5

Factorial 5 Number Is = 120