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- using System;
- class IsPrimeNumber
- {
- static void Main()
- {
- Console.Write("Enter positive integer number n<=100: ");
- int num = int.Parse(Console.ReadLine());
- int prime = 0;
- if ((num < 0) || (num > 100))
- {
- Console.WriteLine("You have entered invaled number.");
- }
- for (int check = 2; check < num; check++);
- {
- if (num % check == 0)
- {
- prime = prime + 1;
- Console.WriteLine("not prime");
- }
- else
- {
- Console.WriteLine("prime");
- }
- }
- }
- }
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