Kotlin Class: Create an Animal class and make animal sounds

Last update on February 05 2025 05:42:11 (UTC/GMT +8 hours)

Write a Kotlin program that creates a class 'Animal' with properties for name and sound. Include a function to make the animal's sound.

Pre-Knowledge (Before You Start!)

Before attempting this exercise, you should be familiar with the following concepts:

• Classes in Kotlin: A class is a template for creating objects with specific attributes and behaviors.
• Primary Constructor: Used to initialize class properties when an object is created.
• Properties: Variables inside a class that store values like an animal’s name and sound.
• Functions in Classes: Functions such as makeSound() define behaviors of the class.
• Object Creation: Creating instances of a class and calling its methods to perform actions.

Hints (Try Before Looking at the Solution!)

Try to solve the problem using these hints:

• Hint 1: Define a class named Animal with properties for name and sound.
• Hint 2: Inside the class, create a function called makeSound() that prints the animal's name along with its sound.
• Hint 3: In the main() function, create instances of the Animal class with different names and sounds.
• Hint 4: Call the makeSound() function for each object to display its sound.

Sample Solution:

Kotlin Code:

class Animal(
    val name: String,
    val sound: String
) {
    fun makeSound() {
        println("$name makes the sound: $sound")
    }
}

fun main() {
    val tiger = Animal("Tiger", "Roar!")
    val lion = Animal("Lion", "Growls!")
    
    tiger.makeSound()
    lion.makeSound()
}

Sample Output:

Tiger makes the sound: Roar!
Lion makes the sound: Growls!

Explanation:

In the above exercise -

• We define a class "Animal" with two properties: name and sound, representing the animal's name and sound.
• The class includes a function makeSound that prints the animal's name along with its sound.
• In the main() function, we create two instances of the Animal class: tiger with the name "Tiger" and sound "Roar!", and lion with the name "Lion" and sound "Growls!".
• We then call the makeSound function on both tiger and lion objects. This prints the animal's name along with its sound using the println function.

Kotlin Editor:

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