In this tutorial, we are going to write a Java program to print factorial of a given number in Java Programming with practical program code and step-by-step full complete explanation.
Java program to print factorial of a given number using recursion.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class JavaFactorialUsingRecursion
{
public static void main(String args[]) throws NumberFormatException, IOException
{
System.out.println("Enter the number: ");
//get input from the user
BufferedReader br=new BufferedReader(newInputStreamReader(System.in));
int a = Integer.parseInt(br.readLine());
int result= fact(a);
System.out.println("Factorial of the number is: " + result);
}
static int fact(int b)
{
if(b <= 1)
//if the number is 1 then return 1
return 1;
else
//else call the same function with the value - 1
return b * fact(b-1);
}
}
Output
Enter the number: 5 Factorial of the number is: 120
