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prime number in java

Question

prime number in java

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Solution

Sure, here is a simple way to check if a number is prime in Java:

public class Main {
    public static void main(String[] args) {
        int num = 29; // number to be checked
        boolean flag = false;
        for(int i = 2; i <= num/2; ++i)
        {
            // condition for nonprime number
            if(num % i == 0)
            {
                flag = true;
                break;
            }
        }

        if (!flag)
            System.out.println(num + " is a prime number.");
        else
            System.out.println(num + " is not a prime number.");
    }
}

This program checks if a number (in this case 29) is a prime number or not. It does this by trying to divide the number by all numbers up to half of itself. If any of these divisions result in a remainder of 0, then the number is not prime. If none of them do, then the number is prime.

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prime number in python

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