Back-End Programming Exam  >  Back-End Programming Videos  >  Kotlin Tutorial for Beginners: Learn Kotlin in easy language  >  #3.4 Kotlin Basics and Syntax: FUNCTIONS CLASS & STRING INTERPOLATION Part-4

#3.4 Kotlin Basics and Syntax: FUNCTIONS CLASS & STRING INTERPOLATION Part-4 Video Lecture | Kotlin Tutorial for Beginners: Learn Kotlin in easy language - Back-End Programming

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FAQs on #3.4 Kotlin Basics and Syntax: FUNCTIONS CLASS & STRING INTERPOLATION Part-4 Video Lecture - Kotlin Tutorial for Beginners: Learn Kotlin in easy language - Back-End Programming

1. What is a function in Kotlin?
Ans. A function in Kotlin is a reusable block of code that performs a specific task. It can accept parameters, perform operations, and return a value. Functions help in organizing code and making it more modular and maintainable.
2. How do you define a function in Kotlin?
Ans. A function in Kotlin is defined using the "fun" keyword, followed by the function name, optional parameters, return type, and the body of the function enclosed in curly braces. Here's an example: fun greet(name: String) { println("Hello, $name!") } In this example, the function "greet" accepts a parameter of type String named "name" and prints a greeting message using string interpolation.
3. What is a class in Kotlin?
Ans. A class in Kotlin is a blueprint for creating objects. It defines the properties and behaviors that an object of that class will have. It serves as a template or a structure to create multiple instances of objects with similar characteristics.
4. How do you create a class in Kotlin?
Ans. To create a class in Kotlin, you use the "class" keyword followed by the class name and the body of the class enclosed in curly braces. Here's an example: class Person { var name: String = "" var age: Int = 0 fun greet() { println("Hello, my name is $name and I am $age years old.") } } In this example, the class "Person" has two properties, "name" and "age", and a function "greet" that prints a greeting message using string interpolation.
5. What is string interpolation in Kotlin?
Ans. String interpolation in Kotlin allows you to embed expressions or variables within a string, making it easier to construct dynamic strings. It is done using the "$" symbol followed by the expression or variable name within curly braces. For example: val name = "John" val age = 25 val message = "My name is $name and I am $age years old." In this example, the variables "name" and "age" are interpolated within the string "message" to create a dynamic string. The output will be "My name is John and I am 25 years old."
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