Swift - Optionals
What will be the output of this Swift code?
var text: String? = nil print(text ?? "Default")
What will be the output of this Swift code?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand nil coalescing operator
The operator ?? returns the left value if not nil, else the right value.Step 2: Apply to given code
Since text is nil, the expression returns "Default" which is printed.Final Answer:
Default -> Option BQuick Check:
Nil coalescing returns default = B [OK]
Quick Trick: Use ?? to provide a default for nil optionals [OK]
Common Mistakes:
- Expecting nil to print as string
- Confusing Optional(nil) with nil
- Thinking it causes runtime error
Master "Optionals" in Swift
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