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

0 vote193 views1 answer
Call class c#
C#
0 vote183 views1 answer
On GAMEOBJECT enable unity
C#
0 vote193 views1 answer
Oncollisionenter2d
C#
0 vote207 views1 answer
Align String with Spaces [C#]
C#
1 vote178 views1 answer
Cshtml url.action
C#
0 vote183 views1 answer
Untiy particle system play
C#
1 vote195 views1 answer
Unity flexiable space
C#
1 vote198 views1 answer
How create another new app file in laravel
C#
0 vote241 views1 answer
Open API support for ASP.NET Core Minimal API
C#
0 vote233 views1 answer
How to make a cast in c#
C#