In this article, we will see how to create functions in Kotlin.
Kotlin functions
Kotlin functions are created using the fun keyword.
Kotlin function example
fun main(args: Array<String>) {
val num1=10
val num2=11
val result = sum(num1, num2)
println("Sum is $result")
}
fun sum(param1:Int, param2:Int) : Int {
return param1 + param2
}
Creating functions with Named parameters
With named parameters, we can pass them in any order.
Kotlin function with named parameter example
fun main(args: Array<String>) {
val num1=10
val num2=11
val result = diff(param2=num2, param1=num1)
println("Difference is $result") // Difference is -1
}
fun diff(param1:Int, param2:Int) : Int {
return param1 - param2
}
Function parameters are immutable
As function parameters are immutable, we can’t directly change them. We can create a copy and make updates on it.
fun main(args: Array<String>) {
val num1=10
diff(num1)
}
fun doSomething(param:Int) {
return param++ // error : Val cannot be reassigned
}
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