Question

write a program in java to input a number and check if it is a prime or not using while loop
plz quick help me​

Answer 1

Explanation:

import java.util.Scanner;

class PrimeCheck

{

public static void main(String args[])

{

int temp;

boolean isPrime=true;

Scanner scan= new Scanner(System.in);

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

//capture the input in an integer

int num=scan.nextInt();

scan.close();

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

{

temp=num%i;

if(temp==0)

{

isPrime=false;

break;

}

}

//If isPrime is true then the number is prime else not

if(isPrime)

System.out.println(num + " is a Prime Number");

else

System.out.println(num + " is not a Prime Number");

}

}

Output:

Enter any number:

19

19 is a Prime Number

Answer 2

Explanation:

aata he easy he par khud try karo