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- using System;
- class PrimeNumsCheck
- {
- static void Main()
- {
- byte byteToCheck;
- Console.WriteLine("Number n (n ≤ 100): ");
- while ((!byte.TryParse(Console.ReadLine(), out byteToCheck)) || !(byteToCheck >= 0 && byteToCheck <= 100))
- {
- Console.WriteLine("Wrong data. Try again.");
- }
- byte prosto = 0;
- for (byte i = 2; i < byteToCheck; i++)
- {
- if (byteToCheck % i == 0)
- {
- prosto = 1;
- }
- if (byteToCheck % i != 0)
- {
- prosto = 0;
- }
- }
- if (prosto == 0 && byteToCheck != 1 && byteToCheck != 0)
- {
- Console.WriteLine("The number {0} is prime.", byteToCheck);
- }
- else
- {
- Console.WriteLine("The number {0} is NOT prime.", byteToCheck);
- }
- }
- }
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