Prime Numbers

Prime numbers

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41,
43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 ...

Prime number

a number that is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11)
suppose a number 'n' it can be divided by if '1' and only by itself then it can be a prime number

Prime number

def is_prime(n):
  if(n<0):
    print("n is not a nature number!")
    return False
  for i in range(1,ceil(n/2)+1):
    if (i != n and i != 1 and n%i == 0):
      return False
  return True
print(is_prime(int(input("number>>"))))

Source: github.com

What are prime numbers

Prime numbers: whole numbers greater than 1 that are only divisible 
by 1 and itself.

Prime numbers

A number only divisible by 1 and itself

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

7 votes198 views1 answer
For loop unity
C#
1 vote228 views1 answer
How to display doubles with trailing zeros in c#
C#
0 vote183 views1 answer
Unity position ui element
C#
0 vote237 views2 answers
Unity list get item at index
C#Unity
47 votes185 views6 answers
C# print to console
C#
24 votes195 views3 answers
String to date vb
C#
0 vote207 views1 answer
Call action method on checkbox click asp.net mvc without pageload
C#
1 vote177 views1 answer
Primitive types c#
C#
0 vote176 views1 answer
C# regex get matched string
C#
7 votes204 views6 answers
C# exit application
C#