[Solved] Find the error in this Kotlin code snippet: fun check(x: Any) { if (x is Int) { println(x + 10) } else if (x is String) { println(x.length) } } | Kotlin

Kotlin - Variables and Type System

Find the error in this Kotlin code snippet:

fun check(x: Any) {
    if (x is Int) {
        println(x + 10)
    } else if (x is String) {
        println(x.length)
    }
}

AMissing else branch

BCannot use <code>+</code> with <code>x</code> without casting

CNo error, code is correct

DCannot access <code>length</code> without explicit cast

Step-by-Step Solution

Solution:

Step 1: Check smart cast usage
After is Int check, x is smart cast to Int, so x + 10 is valid.
Step 2: Check smart cast for String
After is String check, x.length is valid without explicit cast.
Final Answer:
No error, code is correct -> Option C
Quick Check:
Smart casts allow direct usage = D [OK]

Quick Trick: Kotlin smart casts remove need for explicit casts [OK]

Common Mistakes:

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