Find out Factorial of a Given Number - with and with out Recursion

Find out Factorial of a Given Number - with and with out Recursion

Here is output :

With Out Recursion

Out Put is as following :

import java.io.*;
class FactorialWithoutRecursion
{
public static void main(String args[]) throws IOException
{
int i, product=1;

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
   System.out.println("Enter the Number : ");
  int n=Integer.parseInt(br.readLine());

System.out.print("Factorial of " + n + " is..  ");
for(i=n;i>=1;i--)
{
if(i!=1)
{
System.out.print(i + " * ");
}
else
{
System.out.print(i );
}
product=product*i;
}
System.out.println(" = "  + product);
}
}

• Save the file with name FactorialWithoutRecursion.java 
• Compile with: javac FactorialWithoutRecursion.java
• Run with: java FactorialWithoutRecursion

With use of Recursion:

Out Put is as following :

import java.io.*;
class Factorial 
{
// this is a recursive function
int fact(int n) 
{
int result;
if(n!=1)
{
System.out.print(n+" * ");
}
else
{
System.out.print( n );
}
if(n==1) return 1;

result = fact(n-1) * n;
return result;
}
}
class FactWithRecursion 
{
public static void main(String args[]) throws IOException
{
int r;
Factorial f = new Factorial();
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
   System.out.println("Enter the Number : ");
  int n=Integer.parseInt(br.readLine());
System.out.print("Factorial of "+ n +" is " );
r=f.fact(n);
System.out.print(" = "+r);
}
}

• Save the file with name FactWithRecursion.java 
• Compile with: javac FactWithRecursion.java
• Run with: java FactWithRecursion