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iOS Swift Collections and Control Flow Introduction to Collections Working With Arrays

Posted by Ronald James
Ronald James
Courses Plus Student 463 Points

whats wrong

whats wrong with my code?

array.swift 
var arrayOfInts = [1,2,3,4,5,6]
arrayOfInts.append(7)  
arrayOfInts + [7] 
let value = arrayOfInts[5] 
arrayOfInts.append(8) 
arrayOfInts + [9] 
let value = arrayOfInts[4]

1 Answer

Charles Ganzen
Charles Ganzen
1,568 Points
Charles Ganzen
Charles Ganzen
1,568 Points

Hi Ronald,

It looks like you've added the new Int of 7 without actually assigning it back to the array.

arrayOfInts + [7] doesn't actually assign your concatenation back to the array arrayOfInts. To achieve this you could do either of the following:

arrayOfInts = arrayOfInts + [7]
OR
arrayOfInts += [7]

Hope that helps!