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C# C# Basics (Retired) Perfect Final

use of if/else in input validation

Add more input validation to the program by printing "You must enter a positive number." if the user enters a negative number.

Add an if/else conditional statement just after parsing the user's provided input to an integer Write a conditional expression to ensure that the remainder of the code in the try block is only executed if the user provides a non-negative number If the user enters a negative number, output to the console the message "You must enter a positive number."

Program.cs
using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            try
            {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            string input = Console.ReadLine();

            int count = int.Parse(input);
                if(count < 1)
                {
                    Console.WriteLine("You must enter a positive number");
                }
            }
        else
        { 
            int i = 0;
            while(i < count)
            {
                i += 1;   
                Console.WriteLine("Yay!");
                }


                catch(FormatException)
                { 
                    Console.WriteLine("You must enter a whole number");
                }
        }
        }
    }
}

1 Answer

Steven Parker
Steven Parker
216,017 Points

It looks like you have a couple of misplaced braces. Right now, the "catch" block is inside the "else" which is inside the "try".

The "catch" should come after the ending brace of the "try" block.