csharp program to find n prime numbers in c# dotnet

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csharp program to find n prime numbers in c# dotnet

Posted by 20Fingers2Brains on Tags: C# , C# Programs , C# Tutorials , CSharp , Program

Prime number program in csharp: c# program for prime number

The following code code prints prime numbers using csharp .net programming language.
Logic for Primer Number is shown below in the code snippet with output:
A number is prime if it is divisible only by one and itself.
Number two is the only even and also the smallest prime number.
Some example prime numbers are 2, 3, 5, 7, 11, 13, 17....etc.
Every student learning programming in csharp .net will definately have to write the basic program to find prime numbers as it helps to develop the logical mind needed for programming
The following program will ask you to enter a number
After taking the input number it will display the number of prime numbers
if you enter 10 the program will show the first 10 prime numbers

Prime Number Code:

 
 using System;

 namespace primerNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            int num, i = 3, count, c;

            Console.WriteLine("Enter the number of prime numbers you want");
            num =Convert.ToInt32( Console.ReadLine());

            if (num >= 1)
            {
               
                Console.WriteLine("First "+num+" Prime Numbers are :\n");
                Console.WriteLine("2");
            }

            for (count = 2; count <= num; )
            {
                for (c = 2; c <= i - 1; c++)
                {
                    if (i % c == 0)
                        break;
                }
                if (c == i)
                {
                    Console.WriteLine("\n"+i);
                    count++;
                }
                i++;
            }
        }
    }
}

After writing this program hit F5 or cltr+F5 .

you will see a black window .program running

Output:-

Enter the number of prime numbers you want

5
First 5 Prime Numbers are:

2
3
5
7
11
Live Demo: