Java Program to Display Prime Numbers

Java Program to Display Prime Numbers

Today i will write two applications.One application will display prime numbers from 1 to 200 and the other application i will not specify the end number i.e from 1 to n.

1.Displaying Prime numbers from 1 to 200 in java

[

public class DisplayPrimeNumbers {
    public static void main(String args[])
    {
        int maximum=200;
        System.out.println("This application prints numbers between 1 and"+maximum);

        for(int j=1;j<=200;j++)
        {
            boolean ifPrime=true;

            for(int i=2;i<j;i++)
            {
                if(j%i==0)
                {
                    ifPrime=false;
                    break;

                }

            }

            if(ifPrime)
            {

                System.out.println(j +"  is a prime number");
            }
        }

    }

}

]

2.

1.Displaying Prime numbers from 1 to n in Java

[

import java.util.Scanner;

public class DisplayPrimeNumbers {

    public static void main(String args[]) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter N value");
        int maximum = input.nextInt();
        System.out.println("This application prints numbers between 1 and" + maximum);

        for (int j = 1; j <= maximum; j++) {
            boolean ifPrime = true;

            for (int i = 2; i < j; i++) {
                if (j % i == 0) {
                    ifPrime = false;
                    break;

                }

            }

            if (ifPrime) {

                System.out.println(j + "  is a prime number");
            }
        }

    }

}

]