Question

WAP to find primorial of a number in java​

Answer 1

Answer:

This program finds the Primorial of a given number.A primorial is also known as P-prime factorial.As factorial a Primorial is the product of all the prime numbers which are present from number till 1.It is denoted as P# of a number. Example- Primorial of 10 is 10#=7*5*3*2=210.

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Answer 2

Primorial defined as the product of all prime numbers inferior or equal to n is a multiplication conditioned par a primality test of the numbers inferior or equal to n.

Example:  

6 # = 2 × 3 × 5 = 30

Here is the WAP:

import java.util.Scanner;

class PrimorialNumber

{

public static void main()

{

Scanner sc = new Scanner(System.in);

System.out.println("Enter number:");

int n = sc.nextInt(); int p=1;  

for(int i=1;i<=n;i++)

{int f=0;

for(int j=2;j<=i/2;j++)

{

if(i%j == 0)

f=1;

break;

}

if(f==0)

p=p*i;

}

System.out.println("Primorial of no. is"+p);

}

}