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PrimeCheck

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Sep 15th, 2015
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C# 1.10 KB | None | 0 0
  1. using System;
  2.  
  3. namespace PrimeCheck
  4. {
  5.     class PrimeCheck
  6.     {
  7.         static void Main()
  8.         {
  9.             Console.WriteLine("Please enter a integer between 0 and 100: ");
  10.             int InputInteger = int.Parse(Console.ReadLine());
  11.             if (InputInteger < 0 ^ InputInteger > 100)
  12.             {
  13.                 Console.WriteLine("Number is outside required range.");
  14.             }
  15.             else
  16.             {
  17.                 int Prime = 0;
  18.                 for (int i = 1; i <= 10; i++) //10 is the biggest number we need for end statement, no point in makuing i <= InputInteger, it will only slow down the program if insanely large numbers are used.
  19.                 {
  20.                     if (InputInteger % i == 0)
  21.                     {
  22.                         Prime++;
  23.                     }
  24.                 }
  25.  
  26.                 bool PrimeCheck = true;
  27.                 if (Prime > 2)
  28.                 {
  29.                     PrimeCheck = false;
  30.                 }
  31.                 Console.WriteLine("Is {0} prime ? {1}", InputInteger, PrimeCheck);
  32.             }
  33.         }
  34.     }
  35. }
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