Kotlin - Null Safety
How do you declare a variable of type String that can hold null values in Kotlin?
How do you declare a variable of type String that can hold null values in Kotlin?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Kotlin's nullable syntax
Kotlin uses a question mark (?) after the type to indicate nullability.Step 2: Identify correct declaration
Onlyval name: String?allows the variable to hold null values.Final Answer:
val name: String? -> Option DQuick Check:
Nullable types require '?' [OK]
Quick Trick: Use '?' after type for nullable variables [OK]
Common Mistakes:
MISTAKES- Using non-nullable type without '?'
- Using 'Nullable
' which is invalid - Using 'String!' which is not Kotlin syntax
Master "Null Safety" in Kotlin
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Kotlin Quizzes