Kotlin - Collections Fundamentals
You want to create an IntArray of size 5 where each element is its index squared (0, 1, 4, 9, 16). Which Kotlin code correctly does this?
You want to create an IntArray of size 5 where each element is its index squared (0, 1, 4, 9, 16). Which Kotlin code correctly does this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Choose correct array type for integers
IntArray is preferred for primitive int arrays.Step 2: Use initializer lambda to square index
Initializer { it * it } correctly computes squares.Final Answer:
val arr = IntArray(5) { it * it } -> Option BQuick Check:
IntArray with square initializer = val arr = IntArray(5) { it * it } [OK]
Quick Trick: Use IntArray(size) { it * it } for squares [OK]
Common Mistakes:
MISTAKES- Using Array instead of IntArray for ints
- Multiplying by 2 instead of squaring
- Wrong initializer syntax
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