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Start your free trialDerian McCrea
1,370 PointsUnsure of math equation used to check ranges.
I'm supposed to check if the value input is less than Zero or Greater than Twenty, then to throw an Exception(); .
Is my logic in how I approach the question correct?
Also what am I missing in my understand of this challenge.
Thanks in advance!
int value = int.Parse(Console.ReadLine());
Console.WriteLine(string.Format("You entered {0}",value));
//unsure of math equation to check ranges below 0 and above 20
if (value = <0 && >20)
{
thorw System.Exception();
}
2 Answers
Steven Parker
231,198 PointsYou're close, here's a few hints:
- a single "=" is an assignment operator, you won't need that in a comparison
- both sides of a logical operator must be a complete comparison (ex: "
x > 5 && x < 13
") - to test if either of two conditions are true, you need the
OR
operator ("||")
I'll bet you can do it now without a code spoiler.
Derian McCrea
1,370 PointsSteve Thanks for your feedback!
Matti Mänty
5,885 PointsYour logic seems, well, logical, but the syntax for checking that needs a value to compare to after each and/or etc. Also the &&-marking you used returns true only of both of the arguments are true. ||-marking returns true if one (or both) of the conditions are true.
if (value <= 0 || value > 20) // this returns true if value is 0 or less than zero AND
Also greater and less comparisons need to happen before you check if it's equal, so in the same order as you would say it: "less/greater than or equal". (As a bonus remark, there's a typo in the word throw!)
Derian McCrea
1,370 PointsThank-you for your feedback Matti!
Derian McCrea
1,370 PointsDerian McCrea
1,370 PointsSo I figured it out I had a spelling error on top of it BUT i had to cheat To actually get one aspect.
Why do i have to throw a "new" System Exception?
I don't understand what can't it be throw "System.Exception();" Is it because in this code it hasn't been previously defined?