How to input a choice that require int and string with console.Read.Line?

Question

User must input numbers and it will return the largest number and its position in the line. To stop entering numbers i want user to be able to input "N". But N is a string and numbers are int.

using System;


public class HelloWorld {
  public static void Main() {

      int n;
      int pg = 0;
      int x = 1;
      int index = 0;
      string rep;

   Console.WriteLine("Enter numbers, press n to stop:");



while (true)
{

 n = Convert.ToInt32(Console.ReadLine());
rep = (Console.ReadLine().ToUpper());

if (n > pg)
 {
pg = n;
index = x;

}

else if (rep == "N")
{
 break;   // Will work only if largest number is first. 

}
x++;


}


 Console.WriteLine("Largest number is:  {0}  ",  pg);
    Console.WriteLine("Position in line : {0}" , index);
  }
}

How can i allow users to input "N" to stop entering numbers?

Thank you

Answer 1

You could check if the input was "N" before you attempt to parse it as an int:

int pg = 0;
int x = 1;
int index = 0;

Console.WriteLine("Enter numbers, press n to stop:");

while (true) {
    string input = Console.ReadLine();

    if (input.Equals("N", StringComparison.OrdinalIgnoreCase)) {
        break;
    }

    if (!int.TryParse(input, out var n)) {
        continue; // Wasn't parseable as int, so loop back round.
    }

    if (n > pg) {
        pg = n;
        index = x;
    }

    x++;
}


Console.WriteLine("Largest number is:  {0}  ", pg);
Console.WriteLine("Position in line : {0}", index);

This will skip over input that wasn't parseable as int too.