Swift - Optionals
Which of the following is the correct syntax to force unwrap an optional integer named
number?Which of the following is the correct syntax to force unwrap an optional integer named number?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall force unwrap syntax
Force unwrapping uses the!after the optional variable name.Step 2: Check each option
let value = number! usesnumber!which is correct syntax; others are invalid or incorrect.Final Answer:
let value = number! -> Option CQuick Check:
Force unwrap syntax = variable! [OK]
Quick Trick: Force unwrap uses exclamation after variable [OK]
Common Mistakes:
- Placing ! before the variable
- Using ? instead of ! for force unwrap
- Calling a non-existent unwrap() method
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