Kotlin - Null Safety
Identify the error in this Kotlin code snippet using the Elvis operator:
val input: String? = null val output = input ? "Default"
Identify the error in this Kotlin code snippet using the Elvis operator:
medium📝 Debug Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Examine the operator used
The code uses?instead of the Elvis operator?:.Step 2: Understand correct Elvis operator usage
The Elvis operator must be?:to provide a default value when the left side is null.Final Answer:
Incorrect operator used; should be ?: instead of ? -> Option AQuick Check:
Elvis operator must be ?: not ? [OK]
Quick Trick: Elvis operator always uses ?: not just ? [OK]
Common Mistakes:
MISTAKES- Using single question mark instead of Elvis operator
- Forgetting the default value after ?:
- Assuming nullable variables cause error here
Master "Null Safety" in Kotlin
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