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C# C# Basics (Retired) Perfect Final

Benneth Paredis
Benneth Paredis
4,597 Points
Posted by Benneth Paredis
Benneth Paredis
4,597 Points

Please help im stuck on the last excercise of C# basics

I tried doing if (numberOfTimes < 0) but treehouse keeps telling me to try again. Thanks in advanced.

Program.cs 
using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {

            Console.Write("Enter the number of times to print \"Yay!\": ");
            try {
            String yeah = Console.ReadLine();
            int numberOfTimes = int.Parse(yeah);
            int counter = 0;

            while (true) {
                if (counter == numberOfTimes) {
                    break;
                }
            else {
                    counter++;
                    Console.Write("Yay!");
              }
             }
            }
            catch (FormatException) {
                Console.Write("You must enter a whole number.");

            }
        }
    }
}
Benneth Paredis
Benneth Paredis
4,597 Points
Benneth Paredis
Benneth Paredis
4,597 Points

Oh , and the excercise is telling me to write "You must write a positive number" if 'numberOfTimes' is negative.

3 Answers

srikarvedantam
srikarvedantam
8,369 Points
srikarvedantam
srikarvedantam
8,369 Points

You should validate the input before processing it. Also, you will have easier time if you apply "for" loop in this scenario (rather than a "while" loop). How about the following solution?

using System;

namespace Treehouse.CodeChallenges
{
    class Program
    {
        static void Main()
        {
            Console.Write("Enter the number of times to print \"Yay!\": ");
            int loopLimit = 0;
            try {
                loopLimit = int.Parse(Console.ReadLine());
            }
            catch(FormatException) {
                Console.WriteLine("You must enter a whole number.");
            }
            if(loopLimit < 0) {
                Console.WriteLine("You must enter a positive number.");
            }
            else {
                for(int i = 0; i < loopLimit; ++i) {
                    Console.WriteLine("Yay!");
                }
            }
        }
    }
}
John Weber
John Weber
6,273 Points
John Weber
John Weber
6,273 Points

Hey! I was also having trouble on the C# Basics final exercise... thanks for posting this!!

Our exercises didn't cover that last line of code... the 

for(int i =0; i < loopLimit; ++i) {}

Can you help me understand it? Does it read:

"Integer 'i' begins at zero, and while 'i' is less than loopLimit, print 'yay', then add one to i"?

I was trying to do this with a while loop. :

using System;

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

            var entry = int.Parse(Console.ReadLine());

            var counter = 0;

            while (entry < counter)
              {
                Console.Write("Yay!");

                counter += 1;
              }


        }
    }
}

Assuming the user entered a positive, whole number, why wasn't this working?

Thank you so much for posting helpful stuff on here.... I wish I could upvote your answer twice!

Benneth Paredis
Benneth Paredis
4,597 Points
Benneth Paredis
Benneth Paredis
4,597 Points

Thank you, worked out great !!!

srikarvedantam
srikarvedantam
8,369 Points
srikarvedantam
srikarvedantam
8,369 Points

Hi John,

A typical "for" loop functions just as you guessed. Roughly, it's syntax / functionality is as follows:

for (index declaration / initialization; index limit check / condition; index increments / decrements) {
     // An iteration of loop logic involving index
}

You can straight away convert a "for" loop to "while" loop as below:

index initialization / initialization;

while(index limit check / condition) {
    // An iteration of loop logic involving index
    index increments / decrements;
}

Your loop is not iterating as the loop's condition is incorrect. The loop's condition (entry < counter) is checking whether user entered input (i.e. "entry" value) is less than "counter" value (which is initialized to 0). But, it should be the other way around i.e. "counter" value should be checked whether it's value is less than "entry" value (counter < entry) or equivalently (entry > counter). Then, the loop condition will hold true and control flow enters the loop block.