Basic-Java-Programs/FFPrime.java at main · hey-its-d2t2/Basic-Java-Programs · GitHub

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/*  Write a program to print first fifteen prime number */

class FFPrime
{
    public static void main(String[] args)
    {
        int count = 0;
        int number = 2;

        System.out.println("First fifteen prime numbers:");

        while (count < 15)
        {
            if (isPrime(number))
            {
                System.out.print(number + " ");
                count++;
            }
            number++;
        }
    }

    public static boolean isPrime(int number)
    {
        if (number <= 1)
        {
            return false;
        }

        for (int i = 2; i <= Math.sqrt(number); i++)
        {
            if (number % i == 0)
            {
                return false;
            }
        }
        return true;
    }
}