Java Examples - factorial

Java Examples

Factorial of a positive integer (English: factorial) are all less than and equal to the product of the number of positive integer, and have the factorial of 0 is 1. Writing a natural number n factorial n !.

I.e., n! = 1 × 2 × 3 × ... × n. Factorial can also recursively defined:! 0 = 1, n = (n-1) × n!!.

The following example demonstrates the implementation of Java factorial code:

/*
 author by w3cschool.cc
 MainClass.java
 */
public class MainClass {
   public static void main(String args[]) {
      for (int counter = 0; counter <= 10; counter++){
         System.out.printf("%d! = %d\n", counter,
         factorial(counter));
      }
   }
   public static long factorial(long number) {
      if (number <= 1)
         return 1;
      else
         return number * factorial(number - 1);
   }
}

The above code is run output is:

0! = 1
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5040
8! = 40320
9! = 362880
10! = 3628800

Java Examples