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- using System;
- class PrimeNumbers
- {
- static void Main()
- {
- uint number;
- bool checkResult;
- int divisionsCheck = 0;
- Console.WriteLine("Check if given positive number is prime. Enter your number n(n<=100): ");
- if (uint.TryParse(Console.ReadLine(), out number) && number > 1 && number <= 100)
- {
- for (int i = 2; i < number; i++)
- {
- checkResult = number % i == 0;
- if (checkResult)
- {
- divisionsCheck = divisionsCheck + 1;
- }
- }
- if (divisionsCheck == 0)
- {
- Console.WriteLine("The number {0} is a prime number.\n", number);
- }
- else
- {
- Console.WriteLine("The number {0} isn't a prime number.\n", number);
- }
- Main();
- }
- else
- {
- if(number == 0 || number == 1)
- {
- Console.WriteLine("0 and 1 aren't prime numbers!");
- }
- Console.WriteLine("Invalid input! Please enter a number which is greater then 1 and smaller or equal to 100!\n");
- Main();
- }
- }
- }
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