JuniorTheoryCommon

What does the program print?

SWIFT

let start = [5, 6, 7]
var list = start
list.append(8)
print(start.count, list.count)

3 4

Expecting 4 4: thinking var list = start gives a second name to the same array. An array is a value type, so list is a separate copy.
Expecting a compile error: thinking a copy of a let array stays constant. The copy follows its own declaration, and list is a var.