Topics
Introduction
I have used Visual Studio 2012 for debugging purpose. But you can use any version of visul studio as per your availability.
Check whether a number is Prime number or not using while loop
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
public class csharpExercise
{
static void Main(string[] args)
{
int num, i, f;
/*Reading number
*/
Console.Write("Enter any number: ");
num = Convert.ToInt32(Console.ReadLine());
f = 0;
i = 2;
while (i <= num / 2)
{
if (num % i == 0)
{
f = 1;
break;
}
i++;
}
if (f == 0)
Console.WriteLine(num+" is a Prime Number");
else
Console.WriteLine(num + " is not a Prime Number");
Console.ReadLine();
}
}
Check whether a number is Prime number or not for while loop
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
public class csharpExercise
{
static void Main(string[] args)
{
int num, i, f;
/*Reading number
*/
Console.Write("Enter any number: ");
num = Convert.ToInt32(Console.ReadLine());
f = 0;
for (i = 2; i <= num / 2; i++)
{
if (num % i == 0)
{
f = 1;
break;
}
}
if (f == 0)
Console.WriteLine(num+ " is a Prime Number");
else
Console.WriteLine(num+" is a Not Prime Number");
Console.ReadLine();
}
}
Result
