PROGRAM
Primorial(P#) is defined to be the product of prime numbers
less than or equal to P. e.g.
3# = 2*3=6
5# = 2*3*5=30
13# = 2*3*5*7*11*13=30030
This is also called p-prime-factorial.
WAP to input a number and print its primordial i.e. n#
SAMPLE DATA
Enter a number=13
13#=2*3*5*7*11*13=30030
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/**
* class primorial finds the primorial of a given number.
* @author: Nitendra Kumar
* @version: June 4/2013
*/
import java.util.Scanner;
public class primorial
{
public int num=0;
public void getnum() //method to accept number from user
{
Scanner in=new Scanner(System.in); //creating object of Scanner class
System.out.println("Enter a number");
num=in.nextInt();
}
public void findprimorial() //method to find out primorial
{
int res=2,flag=0;
String str="2";
for(int i=3;i<=num;i++)
{
flag=0;
for(int j=2;j<i;j++)
{
if(i%j==0)
{
flag=1;
break;
}
}
if(flag!=1)
{
res*=i;
str=str+ "*" +i;
}
}
System.out.println(num +"#= " +str +"=" +res);
}
public static void main()
{
primorial ob=new primorial(); //creating object of primorial class
ob.getnum(); //calling method
ob.findprimorial(); //calling method
}
}
OUTPUT:
Enter a number
13
13#= 2*3*5*7*11*13=30030
/*---------------Program developed by: Nitendra Kumar---------------*/
//For more details visit http://javawithnitendra.blogspot.in
