[Solved] What does the Elvis operator ?: do in Kotlin? — Ans: Returns the left value if it is not null; otherwise returns the right value | Kotlin

Kotlin - Null Safety

What does the Elvis operator ?: do in Kotlin?

AChecks if two values are equal

BConverts a value to a string

CThrows an exception if the left value is null

DReturns the left value if it is not null; otherwise returns the right value

Step-by-Step Solution

Solution:

Step 1: Understand the Elvis operator purpose
The Elvis operator ?: is used to provide a default value when the left side is null.
Step 2: Analyze the behavior
If the left value is not null, it returns that value; otherwise, it returns the right value as a fallback.
Final Answer:
Returns the left value if it is not null; otherwise returns the right value -> Option D
Quick Check:
Elvis operator = default value if null [OK]

Quick Trick: Elvis operator gives a fallback value if null [OK]

Common Mistakes:

MISTAKES

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What does the Elvis operator ?: do in Kotlin?