Recursive factorial method : Recursive Method « Class Definition « Java Tutorial

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Java Tutorial » Class Definition » Recursive Method

5. 10. 4. Recursive factorial method


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));



  }



  // recursive declaration of method factorial

  public static long factorial(long number) {

    if (number <= 1) // test for base case

      return 1; // base cases: 0! = 1 and 1! = 1

    else

      // recursion step

      return number * factorial(number - 1);

  }

}

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

5. 10. Recursive Method
	5. 10. 1.	Recursion: a method (function) calls itself
	5. 10. 2.	The Towers of Hanoi
	5. 10. 3.	Recursion: another example
	5. 10. 4.	Recursive factorial method
	5. 10. 5.	Recursive fibonacci method
	5. 10. 6.	Recursive method to find all permutations of a String

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