Factorial in Java Hackerearth Problem Solution

 

Factorial in Java HackerEarth Basic Problem Solution.

Factorial Program in Java: Factorial of n is the product of all positive descending integers. Factorial of n is denoted by n!. For example 4! = 4*3*2*1 = 24

Problem:

You have been given a positive integer N. You need to find and print the Factorial of this number. The Factorial of a positive integer N refers to the product of all numbers in the range from 1 to N. You can read more about the factorial of a number here.

Input Format:

The first and only line of the input contains a single integer N denoting the number whose factorial you need to find.

Output Format

Output a single line denoting the factorial of the number N.

Answer: 

	//import for Scanner and other utility classes
	import java.util.*;
	class TestClass {
	public static void main(String args[] ) throws Exception {
	// Write your code here
	TestClass f = new TestClass();
	int n;
	Scanner sc = new Scanner(System.in);
	n = sc.nextLine();
	System.out.print(f.fact(n));
	}
	public int fact(int n){
	int a=1;
	if(n==0){
	return 1;
	}else{
	a = n* fact(n-1);
	}
	return a;
	}
	}

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