Question

How to calculate Nth prime number in C#

Answer 1

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

using System;

class CalculateNthPrimeNumber_CSharp
{
    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;
    }
 
    static void Main() {
        int nth = 8;
       
        Console.Write("Nth prime: " + GetTheNthPrimeNumber(nth));
    }
}
 
 
 
/*
run:
 
Nth prime: 19
 
*/

 

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