[Solved] Which of the following is the correct syntax to declare an infix function in Kotlin? — Ans: infix fun add(x: Int): Int = this + x | Kotlin

Kotlin - Functions

Which of the following is the correct syntax to declare an infix function in Kotlin?

Afun add infix(x: Int): Int = this + x

Binfix fun add(x: Int): Int

Cfun infix add(x: Int, y: Int): Int = x + y

Dinfix fun add(x: Int): Int = this + x

Step-by-Step Solution

Solution:

Step 1: Recall infix function syntax
An infix function must be declared with the keyword infix before fun, have exactly one parameter, and a body.
Step 2: Check each option
infix fun add(x: Int): Int = this + x correctly uses infix fun add(x: Int): Int = this + x. fun infix add(x: Int, y: Int): Int = x + y has two parameters, invalid. infix fun add(x: Int): Int misses function body. fun add infix(x: Int): Int = this + x has wrong keyword order.
Final Answer:
infix fun add(x: Int): Int = this + x -> Option D
Quick Check:
Infix keyword before fun, one parameter only = A [OK]

Quick Trick: Infix keyword comes before fun, one parameter only [OK]

Common Mistakes:

MISTAKES

Master "Functions" in Kotlin

9 interactive learning modes - each teaches the same concept differently

More Kotlin Quizzes

Which of the following is the correct syntax to declare an infix function in Kotlin?