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Alia Khan
3,733 PointsReading Arrays in Swift
Hi in terms of reading arrays I feel like I understand them. In the video we learnt that array indexes start at 0 e.g. var animals = ["Cat", "Dog", "Frog"] The index for cat would be 0 Dog would be 1 and Frog would be 2
however in the challenge video the correct answer confuses me
The 3rd task is to retrieve the 5th item from the array and assign the result to a constant named value var arrayOfInts = [1,2,3,4,5,6] arrayOfInts.append(7) arrayOfInts += [8] let value = arrayOfInts[6]
in the list of numbers the index for 1 =0 2=1 3=2 4=3 5=4 6= 5 7=6
the 5th item is the number 6 as it has an index of 5 however in the challenge the correct answer is 4
could anyone please explain
thanks you
1 Answer
Jennifer Nordell
Treehouse TeacherHi there! When they say the ordinal numbers they mean like we humans say it. Here's a quote from your question:
the 5th item is the number 6 as it has an index of 5
But given this array arrayOfInts = [1,2,3,4,5,6] The first item is 1. We don't say the zeroth item 
Alia Khan
3,733 PointsAlia Khan
3,733 Pointshaaha ok Got It! so the 5th item that the challenge was referring to was actually the fifth item as in the number 5 it wasn't the index number 5 . That's why I thought at index number 5 the answer would be 6
I understand that now Thank you :D