Question

How to calculate the Nth prime number in Java

Answer 1

// 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73

public class CalculateNthPrimeNumber_Java
{
	private static int GetTheNthPrimeNumber(int nth) {
		int prime = 1, count = 0, i;

		while (count < nth) {
			prime += 1;
			for (i = 2; i <= prime; i++) {
				if (prime % i == 0) {
					break;
				}
			}
			if (i == prime) {
				count = count + 1;
			}
		}

		return prime;
	}

	public static void main(String[] args)
	{
		int nth = 8;

		System.out.print("Nth prime: " + GetTheNthPrimeNumber(nth));
	}
}



/*
run:
 
Nth prime: 19
 
*/

 

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