Kotlin Exercises

Welcome to The Coding College! The best way to master Kotlin is through practice. This post provides a variety of Kotlin exercises, ranging from beginner to advanced levels, to help you strengthen your understanding of key concepts. Each exercise comes with a description and sample output to guide you.

    1. Beginner-Level Exercises

    Exercise 1: Hello World

    Write a program to print “Hello, World!” to the console.

    Code Example:

    fun main() {
    println("Hello, World!")
}

    Exercise 2: Variables and Arithmetic

    Create a program that declares two variables, performs addition, and prints the result.

    Task:

    • Declare two variables, a and b.
    • Add them and display the sum.

    Code Example:

    fun main() {
    val a = 10
    val b = 20
    println("The sum is: ${a + b}")
}

    2. Intermediate-Level Exercises

    Exercise 1: Age Checker

    Write a program to check if a person is eligible to vote (18 years or older).

    Code Example:

    fun main() {
    val age = 20
    if (age >= 18) {
        println("Eligible to vote.")
    } else {
        println("Not eligible to vote.")
    }
}

    Exercise 2: Multiplication Table

    Generate and print the multiplication table for a number provided by the user.

    Task:

    • Use a for loop to print the table.

    Code Example:

    fun main() {
    val number = 5
    for (i in 1..10) {
        println("$number x $i = ${number * i}")
    }
}

    3. Advanced-Level Exercises

    Exercise 1: Class and Objects

    Create a class Student with properties name and age. Write a function to display student details.

    Code Example:

    class Student(val name: String, val age: Int) {
    fun displayDetails() {
        println("Name: $name, Age: $age")
    }
}

fun main() {
    val student = Student("Naman", 24)
    student.displayDetails()
}

    Exercise 2: File Handling

    Write a program to create and write content into a file, then read and display the content.

    Code Example:

    import java.io.File

fun main() {
    val fileName = "example.txt"
    File(fileName).writeText("Learning Kotlin is fun!")
    println(File(fileName).readText())
}

    Why Practice Kotlin with The Coding College?

    We provide clear, actionable exercises to help you practice coding in real-world scenarios. By working through these exercises, you’ll gain hands-on experience and a deeper understanding of Kotlin’s features.

    Conclusion

    Practice makes perfect! These exercises are designed to cover a wide range of topics and difficulty levels. Start with the beginner exercises and work your way up to advanced challenges.

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