Csharp program to print first n prime numbers using while loop

Csharp program to print first n prime numbers using while loop

In this tutorial, we will discuss the concept of the Csharp program to print first n prime numbers using a while loop

In this post, we will learn how to print first n prime numbers using a while loop in C# programming language with Example program.

Prime number

The number that can be divided by 1 and itself. it is called a prime number

for Example 2,3,5,7,11,13…

Print first n prime numbers using while

Print first n Prime numbers – method 1

In this program,  the user declares and initializes variables then it will print first n prime numbers,  using the while loop in the C# language.

Program 1

using System;
namespace primeNumber
{
    class first_N_Prime_Num
    {
        static void Main(string[]args)
        {
            int i=1,j=1,count=0,n=0;
        Console.WriteLine("first 15 prime number ");
        //read input from the user
        while(n<15){//outter while
        j=1;
        count=0;
        while(j<=i){//inner while
            if(i%j==0)
                    count++;
                    j++;
        }
            if(count==2){
                Console.Write(i+",");
                n++;
        }
        i++;
    }
}
    }
}

When the above code is executed, it produces the following result

first 15 prime number
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,

 

 

Print first n Prime numbers – method 2

This program allows the user to enter a positive number for num then it will print first n prime numbers,  using the while loop in the C# language.

Program 2

using System;
namespace primeNumber
{
    class first_N_Prime_Num
    {
        static void Main(string[]args)
        {
            int i=1,j=1,num,count=0,n=0;
        Console.WriteLine("first n prime number ");
        Console.WriteLine("Enter the number");
        num=int.Parse(Console.ReadLine());
        //read input from the user
        while(n<num){//outter while
        j=1;
        count=0;
        while(j<=i){//inner while
            if(i%j==0)
                    count++;
                    j++;
        }
            if(count==2){
                Console.Write(i+",");
                n++;
        }
        i++;
    }
}
    }
}

When the above code is executed, it produces the following result

first n prime number
Enter the number
10
2,3,5,7,11,13,17,19,23,29,

 

 

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