Using String Variable with Kotlin Programming Language |Part-2|

String Variable with Kotlin

Greetings!

Hello Everyone here, Creating another video to demonstrate how to use String Variables in Android Studio using Kotlin Programming language.



 

Environment

Software: Android Studio
Programming Language: Kotlin

Summary

Its a beginner example and Part two of my Kotlin Programming Guide.

To declare any variable in Kotlin, you can simply use two keywords.

Var and Val

First, we are going to use Var Variables is the General variable that can be changed anytime throughout the Kotlin programming.

However, the Val variables are the constraint variables and can be declared only once.

Practice tasks

1. Open Android Studio and go to your project > Java > <com.folder> and edit the Kotlin file to create the variable:

fun main()
{
var name = "James"
val lname = "McDonald"
println(name)
println(lname)
}

Result: Run the compilation and see what happens, Check for error and update it here in comments.

2. Try to reassign a new value to the "var" variable name and the "val" variable lname and see if we can change the value at the later point during our program.

Result: Share the error, if any.

3.  Assign null values to the variables and check out for the outcome. Check for error.
Assign null String declaration to the available by using

:String? Next to the variable name.

Result: Share the error, if any.

We can also assign variables outside the function as well using this method variable will be easily accessible to the other Functions throughout the program.

While declaring the string variable, you may think about how the program decides what kind of variable it. Kotlin chooses the type of variable with very first user input. Like when you mentioned string value to the variable with the quotes that time it assigned, they string type to the variable, and that variable name will remain String Variable throughout the program.
Similarly, if we are going to assign Integer or Float value to the variable for the very first time, it will take is as the Float/Integer variable. We will discuss other types of variables in another post in more detail.

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