[Solved] Which of the following is the correct syntax to declare a local function inside a Kotlin function? — Ans: fun outer() { fun inner() { println("Hi") } inner() } | Kotlin

Kotlin - Functions

Which of the following is the correct syntax to declare a local function inside a Kotlin function?

Afun outer() { fun inner: () -> Unit = { println("Hi") } inner() }

Bfun outer() { fun inner() { println("Hi") } inner() }

Cfun outer() { val inner = fun() { println("Hi") } inner() }

Dfun outer() { def inner() { println("Hi") } inner() }

Step-by-Step Solution

Solution:

Step 1: Review Kotlin local function syntax
Local functions are declared with fun keyword inside another function, followed by parentheses and body.
Step 2: Check each option
fun outer() { fun inner() { println("Hi") } inner() } uses correct syntax: fun inner() { ... } inside outer(). fun outer() { fun inner: () -> Unit = { println("Hi") } inner() } uses lambda syntax incorrectly. fun outer() { val inner = fun() { println("Hi") } inner() } uses anonymous function assigned to val, which is valid but not a local function declaration. fun outer() { def inner() { println("Hi") } inner() } uses def which is invalid in Kotlin.
Final Answer:
fun outer() { fun inner() { println("Hi") } inner() } -> Option B
Quick Check:
Local function syntax = fun inside fun [OK]

Quick Trick: Local functions use 'fun' keyword inside another function [OK]

Common Mistakes:

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Which of the following is the correct syntax to declare a local function inside a Kotlin function?