Updating static array elements in Swift in Swift

Unlike strings, the entries of arrays are mutable and can be changed freely, using indices and the bracket notation:

var ourArray = [50, 40, 30]
ourArray[0] = 15
ourArray[1] = -1

// ourArray is now [15, -1, 30]

Assignment
Follow the Coding Tutorial and let's play with some arrays.

Hint
Look at the examples above if you get stuck.