iOS Swift - Swift Language Essentials
Which of the following enum case declarations correctly uses an associated value in Swift?
Which of the following enum case declarations correctly uses an associated value in Swift?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Review correct syntax for associated values
In Swift, an enum case with associated values is declared ascase name(Type)or with labels likecase name(label: Type).Step 2: Analyze each option
case message(text: String) uses labeled associated value syntax correctly. Options B, C, and D use invalid syntax for enum cases.Final Answer:
case message(text: String) -> Option CQuick Check:
Associated values use parentheses and optional labels [OK]
Quick Trick: Use parentheses for associated values in enum cases [OK]
Common Mistakes:
- Using equal sign instead of parentheses
- Using colon instead of parentheses
- Trying to assign raw values without rawValue enum
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