A presentation made at the Google IO 18 extended for Google Developers Group (GDG) Covenant University. Introducing the Kotlin programming language and features it has that makes software development more pleasant. It also touches a little on its goodness in Android application development.

1. What's new with
By Simileoluwa Aluko

2. Outline
Brief Introduction of Kotlin
Syntax
What's new with Kotlin
Kotlin and Android
Beyond Android
References

3. A Brief Introduction
Kotin is a statically typed programming language for Multiplatform
applications.
It is 100% interoperable with Java and the Android platform.
Kotlin is an official language on Android. It is officially supported by
Google.
Kotlin can be used to build Server-Side applications, Web applications and
Native applications

4. Why kotlin?
Concise
It drastically reduces the amount of boilerplate code. You are set free from writing
redundant lines of code!
Safe
Errors due to null pointer exceptions are properly handled in kotlin. This helps you avoid
a ton of errors. Variables cannot be set to null by default.
Interoperable
Kotlin is fully compatible with any library on the JVM and Android. It can also be deployed
on the browser

5. Kotlin syntax
The Famous "Hello World!"

6. Kotlin syntax
It is object oriented

7. Kotlin syntax
For the "Androiders"

8. Kotlin syntax
Functions

9. What's new with kotlin
Getter and setter classes
Data classes
Classes are not expensive
Initialising variables by lazy
Extension functions
Default parameter values
When statement
With and Apply
Maps
Null Safety
Coroutines

10. What's new with kotlin
Kotlin Java
Getter and setter classes

11. What's new with kotlin
Classes are not expensive

12. What's new with kotlin
Variables by Lazy

13. What's new with kotlin
Extension functions

14. What's new with kotlin
When statement

15. What's new with kotlin
Apply

16. What's new with kotlin
With

17. What's new with kotlin
Maps

18. What's new with kotlin
Null Safety
Nullable types and non-null types
Safe calls
Elvis operator

19. What's new with kotlin
Coroutines
Coroutines are really nice. Basically, they are like very minimal light-weight Threads. The
Read more about them here : https://kotlinlang.org/docs/reference/coroutines.html

20. Kotlin and Android
A few highlights...
Avoid NullPointerExceptions in your code.
Code becomes more readable and concise.
Lambdas .
Default and named arguments.
Bye✌🏽👋🏽 findViewById().
Extend functionality without inheritance using extensive functions.
100% interoperable with java.
Kotlin is an open source project; just like our beloved Android.

21. Beyond Android
➤ Kotlin for server side development
http://kotlinlang.org/docs/reference/server-overview.html
➤ Kotlin for Web development
http://kotlinlang.org/docs/reference/js-overview.html
➤ Kotlin/Native
http://kotlinlang.org/docs/reference/js-overview.html

22. References
https://kotlinlang.org
https://kotlinlang.org/docs/reference/
https://developer.android.com/kotlin/
Google IO18 - How to Kotlin by Andrey Breslav

23. “ Kotlin is not just about writing your
app with lesser lines.
It’s all about writing SAFER &
BETTER APPS!

24. Gracias!