Gain insights into Kotlin’s syntax, type inference, higher-order functions, classes, operator overloading, and extension functions. Explore key features to enhance your efficiency in Kotlin development.

kotlin.tar.gz

Kotlin

Kotlin-1

Kotlin is an elegant general-purpose language with a rich syntax that enables us to write concise and expressive code. Much of its appeal also stems from the fact that it is fully interoperable with Java and has multi-platform support. Kotlin is also an official Android language ranked by Google as the most preferred language for Android app development.

In this course, you’ll learn about type inference in Kotlin as well as about Kotlin’s support for higher-order functions. You’ll cover classes, objects, and other interesting themes relevant to these topics. You’ll finish with operator overloading, extension functions, and scoping functions.

This course is specially designed for Java professionals who want to get into Kotlin development with minimal time and effort. This is not an encyclopedic work on Kotlin. Rather, it focuses on the necessary foundations and the best features that Kotlin has to offer. After completing this course, you’ll feel more comfortable reading and writing Kotlin code.

Kotlin Compact

# Problem statement

Given a list of integers, count the number of occurrences of even numbers in the list. To do this, you are required to perform the following tasks:

- Define a function, `countOfEven`, to calculate the number of even integers in the input list, `listOfIntegers`, of the `List<Int>` type, passed to the function.
- One of the ways to loop over a list in Kotlin, is to invoke the higher order function `forEach` on that list. Pass a lambda expression to `forEach`.

## Sample test case

```kotlin
var listOfIntegers = listOf(1, 4, 6, 3, 9, 7, 0) 
countOfEven(listOfIntegers)
```
## Expected output
```
3
```



Test your understanding by solving the exercise given in this lesson.

About the course

Understanding Kotlin Code

Some Interesting Kotlin Features

More Kotlin Magic

Conclusion

Challenge: Lambda Expression

Problem statement