Prime number Upto n

using System;
public class Program
{
    static void Main(string[] args)
    {
        var results = GenerateSieve(1000);
        var i=0;
        foreach (var item in results)
        {
            if(item) Console.Write(i + " ");
            i++;
        }
    }
 
    static bool[] GenerateSieve(int num)
    {
        // Creating an array indicating whether numbers are prime.
        bool[] isPrime = new bool[num + 1];
        for (int i = 2; i <= num; i++) isPrime[i] = true;
 
        // Removing out multiples.
        for (int i = 2; i <= num; i++)
        {
            // Check if i is prime.
            if (isPrime[i])
            {
                // Eliminate multiples of i.
                for (int j = i * 2; j <= num; j += i)
                    isPrime[j] = false;
            }
        }
        return isPrime;
    }
}

Source: ideone.com

Similar codes

1 vote150 views1 answer
Path desktop c#
C#
2 votes144 views1 answer
Restclient basic auth c#
C#
0 vote189 views1 answer
Unity color set alpha
C#Unity
0 vote143 views1 answer
Unity draw ray from one object to another
C#
0 vote157 views4 answers
How to get c# code of aspx page
C#
0 vote150 views1 answer
Firefoxoptions setpreference to trust certificates
C#
0 vote144 views1 answer
Fpdf c#
C#
6 votes194 views1 answer
How to change a image with code unity
C#Unity
5 votes146 views1 answer
Unity call a function every x seconds
C#
0 vote140 views1 answer
Transformar de string a int c#
C#