[Solved] Identify the error in this Kotlin code snippet: val nums = listOf(1, 2, 3) nums.forEach(i -> println(i)) | Kotlin

Kotlin - Collections Fundamentals

Identify the error in this Kotlin code snippet:

val nums = listOf(1, 2, 3)
nums.forEach(i -> println(i))

ACalling println inside forEach is not allowed

BMissing parentheses after forEach

CUsing val instead of var for list

DUsing arrow (->) instead of curly braces for lambda

Step-by-Step Solution

Solution:

Step 1: Check lambda syntax in Kotlin
Kotlin uses curly braces {} for lambdas, not arrow notation like -> outside braces. The arrow is used inside the lambda to separate parameters from body.
Step 2: Identify the incorrect usage
The code uses i -> println(i) directly after forEach without braces, which is invalid syntax. Correct form is nums.forEach { i -> println(i) }.
Final Answer:
Using arrow (->) instead of curly braces for lambda -> Option D
Quick Check:
Lambda needs braces {} around arrow -> [OK]

Quick Trick: Use { param -> code } for lambdas, not (param -> code) [OK]

Common Mistakes:

MISTAKES

Master "Collections Fundamentals" in Kotlin

9 interactive learning modes - each teaches the same concept differently

More Kotlin Quizzes

Identify the error in this Kotlin code snippet: