Java Factorial Program – Java Sorting Examples: a helpful blog for those learning about the factorial function.
Factorial of a Number Using Recursion
In this program, we will learn how to find the factorial of a number using recursion in Java.
Recursion is the process of defining something in terms of itself. A method that uses this technique is recursive.
The Coding:
import java.util.*;
public class Factorial {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print(“Enter number : “);
This is a classic Java Factorial Program Example. It shows how to create a Java factorial program using recursion, iterative, and using the factorial methods provided by the Apache Commons Math library.
Java Factorial Program – Recursive Approach
The first approach to creating a Java factorial program is to use recursion. This involves calling a method from within itself until some condition is met. The recursive approach to writing this Java Factorial Program Example looks like this:
public class FactorialExample1 {
public static void main(String[] args){
int i = 5;
System.out.println(“Factorial of “+i+” is: “+factorial(i));
}
public static int factorial(int number){ //Recursive method
if(number == 0){
return 1;
}else{
return(number * factorial(number-1)); //Method calls itself: Recursive call
}
}
}
Factorial program in java with examples of fibonacci series, armstrong number, prime number, palindrome number, factorial number, bubble sort, selection sort, insertion sort, swapping numbers etc.
Java Program to Find Factorial of a Number using Recursion
import java.util.*;
public class Factorial {
public static void main(String[] args) {
int num = 10;
long factorial = 1;
for(int i = 1; i <= num; ++i) { // factorial = factorial * i; factorial *= i; } System.out.printf("Factorial of %d = %d", num, factorial); } } import java.io.*; import java.util.*; class Factorial { public static void main(String args[]) { int n,i,fact=1;//Factorial Function Scanner obj=new Scanner(System.in);//Input From User n=obj.nextInt();//Input From User for(i=1;i<=n;i++)//Factorial Logic { fact=fact*i;//Result Of Factorial } System.out.println("factorial="+fact);//Print Result To User Screen import java.io.*; class Factorial { public static void main(String args[])throws IOException { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); int n,fact=1; System.out.println("Enter the number whose factorial is to be calculated"); n=Integer.parseInt(br.readLine()); for(int i=1;i<=n;i++) fact*=i; System.out.println("The factorial of "+n+" is: "+fact);} } public class FactorialExample{ public static void main(String args[]){ int i,fact=1; int number=5;//It is the number to calculate factorial for(i=1;i<=number;i++){ fact=fact*i; } System.out.println("Factorial of "+number+" is: "+fact); } }