We can get the length of an array using the .count property like this:
let ourArray = [50, 40, 30]
// Printing the length:
print(ourArray.count) // Output: 3
Using the length
We can use the length to access items from the end of an array.
Because arrays are 0-indexed, the index of the last item is count - 1:
let ourArray = [50, 40, 30]
// Printing the last item:
print(ourArray[ourArray.count - 1]) // Output: 30
// Printing the second to last item:
print(ourArray[ourArray.count - 2]) // Output: 40
Assignment
Follow the Coding Tutorial and let's play with some arrays.
Hint
Look at the examples above if you get stuck.
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