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Start your free trialJasmin Kaufmann
3,642 PointsC# Collections GetPowersOf2() error
So in order to solve this exercise i looked up the definition of the Math.Pow method and found this:
public static double Pow (double x, double y); Parameters x Double A double-precision floating-point number to be raised to a power.
y Double A double-precision floating-point number that specifies a power.
Returns Double The number x raised to the power y.
But when i use it as described Math.Pow(i, 2) I get an error messagebut when I switched it around to Math.Pow(2,i) it said all was fine and the exercise was marked as completed. So is there an error in the exercise? Or in the microsoft documentation?
2 Answers
Steven Parker
231,210 PointsOne way raises "i" to the power of 2 (a square), and other raises 2 to the power of "i". The name "GetPowersOf2" would imply that they want you to do the latter.
A function that would use the first one would probably have a name like "GetSquares".
Please post a link to the course page if you'd like a more specific answer.
Steven Parker
231,210 PointsUpdate: This is probably a good real-world practice. Sometimes deciphering the instructions can be the hardest part of a task!
Jasmin Kaufmann
3,642 Points"Create a static method named GetPowersOf2 that returns a list of integers of type List<int> containing the powers of 2 from 0 to the value passed in"
I guess "containing 2 raised to the powers from 0 to the value passed in" would have confused me less :)
https://teamtreehouse.com/library/c-collections/lists/lists-2
Jasmin Kaufmann
3,642 PointsJasmin Kaufmann
3,642 PointsOk, I re-read it about 5 times now. So what they wanted was to raise 2 to the power of 0,1,.., value. Guess the method name GetPowersOf2 was misleading to me..