[Solved] The following Swift code is intended to find the union of ... What is the error?let setX: Set = ["apple", "banana"] let setY: Set = ["banana", "cherry"] let combined = setX.union setY print(combined) | Swift

Swift - Collections

The following Swift code is intended to find the union of two sets setX and setY. What is the error?

let setX: Set = ["apple", "banana"]
let setY: Set = ["banana", "cherry"]
let combined = setX.union setY
print(combined)

Aunion cannot be used with string sets.

BSets must be arrays to use union.

CThe print statement is incorrect.

DMissing parentheses after union method call.

Step-by-Step Solution

Solution:

Step 1: Check method call syntax
In Swift, methods require parentheses even if they take parameters. The code uses setX.union setY without parentheses.
Step 2: Correct syntax for union
The correct call is setX.union(setY). Other options are incorrect because union works on sets of strings and print is valid.
Final Answer:
Missing parentheses after union method call. -> Option D
Quick Check:
Method calls need parentheses [OK]

Quick Trick: Always use parentheses when calling methods [OK]

Common Mistakes:

Master "Collections" in Swift

9 interactive learning modes - each teaches the same concept differently

More Swift Quizzes

The following Swift code is intended to find the union of two sets setX and setY. What is the error?