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nave lahav
388 Pointswhy isn't this working
this code doesn't seem to be the right answer, why is that?
using System;
namespace Treehouse.CodeChallenges
{
class Program
{
static void Main()
{
try{
Console.Write("Enter the number of times to print \"Yay!\": ");
var times = Console.ReadLine();
int number = Int32.Parse(times);
if(number < 0){
Console.WriteLine("You must enter a positive number.");
}
int i = 0;
while(i != number)
{
i+=1;
Console.WriteLine("Yay");
}
}
catch(FormatException)
{
Console.Write("You must enter a whole number.");
}
}
}
}
2 Answers
Steven Parker
229,644 PointsIt looks like your loop might run too long.
Looking at your loop condition:
while(i != number)
That should work for valid inputs, but when the input is negative, the loop would run for very many cycles (nearly infinite). But this case can be easily accomodated by using an inequality test instead: "i < number".
Mohamed Monir
22,362 Pointstry { Console.Write(" Enter the number of times to print \"Yay!\": "); var i = 0; var num = int.Parse(Console.ReadLine()); while(true) { if(i>= num) { break; } Console.WriteLine("Yay!"); i++; } // loop for the number //print Yay! } catch(FormatException) { Console.WriteLine("Error"); }
nave lahav
388 Pointsnave lahav
388 Pointscan you send an example, I don't quite understand
Steven Parker
229,644 PointsSteven Parker
229,644 PointsJust image the number input was -1. As the loop starts "i" is 0, which does not equal -1, so the loop runs. The the next time "i" is 1, which also does not equal -1. Then 2, then 3, etc. Every time through the loop, "i" continues to get bigger, but since it does not equal the number (-1), the loop keeps going.
By testing if "i" is less than tne number instead of just not equal, any negative number will cause the test to fail and the program will end as it should.
Does it make sense now?