Question

Write a program to accept a number and display that its a prime or non-prime number.

Answer 1

import java.util.*;

public class Prime

{

public static void main(String args[])

{

Scanner in=new Scanner(System.in);

int a,i;

//using for loop

for(i=2;i<=a/2;i++)

{

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

a=in.nextInt();

if(a%i!=0)

continue;

elseif(a%i==0)

{

System.out.println("Its a non-prime number");

}

else

{

System.out.println("Its a prime number");

}

}

}

}

Answer 2

import java.util;

public class Prime_Non-prime

{

public static void main(String args[])

{

Scanner in=new Scanner(System.in);

int x,y;

System.out.println("Enter the value of the number");

x=in.nextInt();

for(y=2;y<=x;y++)

//using nested if

if(x%y!=0);

continue;

elseif(x%y==0)

{

System.out.println("Its a non-prime number");

}

else

{

System.out.println("Its a  prime number");

}

}

}