In Kotlin whatever value you define here that determines the data types of the variable. Suppose (var myNumber =10),that automatically becomes integer value. Similarly, you can write the datatypes of the variable (var myString: String). In case of the mutable string, you can modify string at any point of time. Example of mutable & immutable string-
fun main(args: Array<String>) {
var myString: String // Mutable String
myString = “Hello World”
myString = “Another World”
val myAnotherString = “My Constant String” // Immutable String
myAnotherString = “Arin” ……Error will be given in this line because Immutable String cannot be modified
}
String Interpolation :-
In Kotlin String interpolation process is little bit different from any other languages.Example-
fun main(arg: Array<String>) {
var rect = Rectangle() // creating object of Rectangle class named rect
rect:length = 5
rect:breadth = 3
print(” length = ${rect.length} and breadth = ${rect.breadth}. Area is ${rect.length * rect.breadth}”)
}
class Rectangle {
var length: Int = 0
var breadth: Int = 0
}
Output :
length = 5 and breadth = 3. Area is 15
Android Developer at Openweb Solutions
