Programmers and web developers must always experiment with new technologies as well as programming tools. With the ongoing global digital revolution, data is consumed as well as generated on a huge level, and developers must use this to build incredible applications for users. Those who want to enter this digital career must take PHP for beginners PHP training by WsCube Tech or learn to create mobile applications.
Mobile applications are becoming pivotal for most businesses, and it offers incredible customer engagement platform. To get a rewarding career, you must remain updated with the latest technology. Kotlin which is a Java-based platform for mobile app development was announced in 2017 by Google I/O as their official language for Android programming app using Android Studio.
What Is Kotlin?
Kotlin is a mobile app development platform which is an open-source project developed under Apache 2.0. This is a language that was developed by JetBrains and is statically typed. It is concise as well as expressive. It is gaining popularity as it has safety features for immutability and nullability so that apps become performant and healthy by default. Learning kotlin is easy just like PHP programming, and you can grasp it in less time. You can learn HTML or learn PHP along with Kotlin to learn how to make a website to create the backend system of the mobile app too.
Kotlin can be used to develop enterprise Java EE applications, and it is 100% compatible with any JVM frameworks too. You can write your application in Kotlin and target JavaScript to run in your browser or on node.js. It does not have any performance impact and has a small runtime and is extensively used for web development too.
Basics of Kotlin
You must be aware of the basics of Kotlin if you want to make a website development career in this or want to create an application using Kotlin. You must have some basic knowledge of Java to learn Kotlin. To start exploring Kotlin, simply install its latest compiler by visiting the website https://kotlinlang.org. Or run your code using the online playground tool.
Classes: Class keyword is used to make a class in kotlin. A class can have several properties, and its member functions are known as methods. Similar to java you can create a variable in this language too using the var keyword. If you make use of the Val keyword, then it means that the variable is an assign once or read-only type.
It is a null-safe programming language which means that there can be variables that are null and others that can never be null. If you want to make a variable that can be null, then you must add (?) sign after the variable type. You can even instantiate a class in kotlin, just like you do for Java but here you use () instead of the new keyword.
Constructors: In Kotlin, constructors can be primary as well as secondary. The syntax which is used in Kotlin to create a primary constructor is very compact. For example:
class Ball (var name: String, var length: Int, var rad: Int?) {
The constructor which serves as the part of the header of the class is the primary constructor. If you want to add more constructors or custom values to your class, then it is known as secondary constructors. For this, the constructor keyword must be used. These constructors must be delegated to the primary constructor by “this” keyword.
Functions: To create functions you must use the “fun” keyword. Pascal notation is used to define function parameters, i.e., name: type. Each of the parameters is separated by commas and must be typed explicitly.
Extensions: you can extend a class in Kotlin by using additional functions. You must not modify the origin of the functions. These functions are termed as extensions. Names of these functions should have the name of the classes that they extend, preceding them.
Derived classes: To make a derived class Kotlin makes use of “:” instead of “extend keyword which is used in Java. The base class header must have an open annotation. If there is a constructor of the base class which takes parameters, then the derived class must initialize the same parameters in the header.
These are some of the basic concepts associated with Kotlin. The concepts are similar to Java, and only the syntax or keywords vary to some extent.
Kotlin Features
Some of the key features of Kotlin, which is responsible for its popularity, are:
Easy to learn: As it follows OOP syntax the language is easy to learn for programmers knowing Java and C#.
Interoperability with Android and Java: This is the greatest functionality and feature of Kotlin. You will be able to use android and java code side by side with kotlin, and it can be compiled successfully as well. The majority of libraries of java and frameworks in the kotlin projects can also be used.
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