Generate Prime Numbers

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 vote133 views1 answer
C# convert ad objectguid to string
C#
0 vote121 views1 answer
Open another form with C# Winforms
C#
0 vote132 views1 answer
JavaScriptSerializer() and convert to base64
C#
0 vote120 views1 answer
Weakreference tryget c#
C#
0 vote175 views1 answer
How to play a random sound at the position that you want in unity
C#Unity
4 votes142 views7 answers
XML
C#
1 vote114 views2 answers
C# remove items from one list that are in another
C#
2 votes129 views1 answer
How to do a web request unity
C#
0 vote123 views1 answer
How to check if list index is out of range in c#
C#
0 vote118 views1 answer
Unity get quaternion z
C#