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- if (choice==1)
- {
- //normal//
- Console.WriteLine("Enter the number:");
- int base_num = Convert.ToInt32(Console.ReadLine());
- int x = 1;
- string numbs = "0";
- Console.Clear();
- Console.WriteLine("0");
- while (x != (base_num + 1))
- {
- numbs += " " + x;
- Console.WriteLine(numbs);
- x += 1;
- }
- x -= 1;
- while (x != 0)
- {
- numbs = numbs.Replace(" " + x, "");
- Console.WriteLine(numbs);
- x -= 1;
- }
- Console.ReadLine();
- }
- else
- {
- if (choice == 2)
- {
- //odd
- Console.WriteLine("Enter the number:");
- int base_num = Convert.ToInt32(Console.ReadLine());
- int x = 1;
- string numbs = "0";
- Console.Clear();
- Console.WriteLine("0");
- while (x != (base_num + 1))
- {
- numbs += " " + x;
- Console.WriteLine(numbs);
- x += 1;
- }
- x -= 1;
- while (x != 0)
- {
- numbs = numbs.Replace(" " + x, "");
- Console.WriteLine(numbs);
- x -= 1;
- }
- Console.ReadLine();
- }
- else
- {
- if (choice==3)
- {
- //even only
- }
- else
- {
- if (choice==4)
- {
- //prime only
- }
- }
- }
- }
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