We declare a variable of String data type. The trailing question mark tells Kotlin that the variable may be null. This time the data type has to be provided explicitly. print("Enter something: ") We print a prompt to the user.
The kotlin switch is one of the statements that can be used to declare the block in the code but now “when” keyword used instead of the switch block the expression also used to validate the conditions it also satisfied and applied with some other similar data types that can be instead o...
We will introduce a method to declare a global variable in PHP using theglobalkeyword. This method will set the global scope of the variable declared outside of a function to the local scope to use the variable inside the function.
How does kclass Work in Kotlin? Generally, the kotlin class works with many scenarios to implement the application. We can use many methods to execute the user operations, and it can be called upon the main method with the help of the class object. The mapping and serialization of the kC...
To be able to use variables in SQLite, you will need to declare them first. The declaration process is fairly simple, depending on the type of variable that you’re trying to create; however, it is slightly different than the native syntax. ...
mentioned above, we now need to create something known as “Events.” These are essentially empty functions that allow Ethereum wallets to monitor the activities of a contract. Remember that every event must start with a capital letter. In order to declare an event, the following code must ...
If an optional contains a value in it, it returns value as Optional<Value>, if not it returns nil. Example 1: How to declare an optional in Swift? var someValue:Int? var someAnotherValue:Int! print(someValue) print(someAnotherValue) When you run the program, the output will be: ...
This is the second and final part of a tutorial that teaches you how to create an app like Runkeeper, complete with color-coded maps and badges!
In this tutorial, I’ll show you how to use Pusher to create a realtime counter in Kotlin. We will be creating a simple Android application with a counter showing how many users have clicked on a button. This click count also updates in realtime when other users click on it. Below is...
Note that we named the libraryjunit-bom, which isn't a valid variable name inKotlin. Gradle deforms the name and replaces the dashes with dereferenced periods, so when we want to use it we'll usejunit.bominstead -- which is a perfect time to see it in action. ...