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Anusha Singh
Courses Plus Student 22,106 PointsCan you help me out with this?
Add more input validation to your program by printing “You must enter a positive number.” if the user enters a negative number. I can't figure out that how can I add more input validation as I have already written a try and catch statement. PLEASE HELP! Thanks, in advance.
using System;
namespace Treehouse.CodeChallenges
{
class Program
{
static void Main()
{
try {
Console.Write("Enter the number of times to print \"Yay!\": ");
string printYay = Console.ReadLine();
int PrintYay = int.Parse(printYay);
int count = 0;
while (count != PrintYay) {
Console.WriteLine("Yay!");
count ++;
if (count == PrintYay) {
break;
}
}
} catch (FormatException) {
Console.WriteLine("You must enter a whole number.");
}
}
}
}
3 Answers
Dale Severude
Full Stack JavaScript Techdegree Graduate 71,349 PointsThis is asking for additional validation within your Try Catch loop. Like Steven said, you will need to add an additional if statement to test for this. I think it is just a matter of visualizing what the question is asking for.
if (PrintYay <= 0)
{
Console.WriteLine("You must enter a positive number.");
}
else
{
//While loop for printing out Yah!
}
Steven Parker
229,608 PointsThis validation will be a bit easier to add than the previous one. After the input is converted to a number in "PrintYay", just test it (with an "if" statement) to see if the value is less than zero, and issue the error message if so instead of running the loop.
Anusha Singh
Courses Plus Student 22,106 PointsHow do you think I can write that down in code?
Steven Parker
229,608 PointsDale's example illustrates my suggestion except where I said "to see if the value is less than zero" (the challenge specifically asks you to test for a negative number):
if (PrintYay < 0) // <-- note "<" instead of "<="
Dale Severude
Full Stack JavaScript Techdegree Graduate 71,349 PointsWith an error message of "You must enter a positive number." I made the assumption that zero needs to be tested also.
Steven Parker
229,608 PointsEasy mistake. But for best results always follow the instructions.
