In this tutorial, we will discuss the Program to calculate factorial of a number using recursion in Java
There are many ways to calculate factorial using Java language. and one of this given below
In this article, we are going to learn how to calculate factorial of a number using the recursive method in Java language
Factorial is a product of all positive descending integer begins with a specified number (n) and calculates up to one
Example
factorial of 5 is
5!=5*4*3*2*1=120
factorial of 4 is
4!=4*3*2*1=24
factorial of n is
n!=n*(n-1)*....2*1
Program
This program allows the user to enter a positive integer number and it calculates the factorial of the given number using the recursive method in Java language
import java.util.Scanner; class FactorialRecursion{ public static void main(String args[]){ int num;//declare the variable num Scanner scan=new Scanner(System.in); //create a scanner object for reacieve input System.out.print("Enter the positive integer number: "); num=scan.nextInt();//reads input from the user long factorial=findFact(num);//call the function findFact(); System.out.println("Factorial of "+num+" : "+factorial); //display factorial on the screen } public static long findFact(int num){//recursive function if(num>=1){ return num*findFact(num-1); //recursive function called itself } else{ return 1; } } }
The above code is executed, it produces the following result
Enter the positive integer number:6 Factorial of 6: 720
Approach
To clearly understand this article, you should have the previous knowledge of the following C programming subject
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