Android Development with Kotlin

Default argument values

Default arguments are mostly known from C++, which is one of the oldest languages supporting them. A default argument provides a value for a parameter in case it is not provided during a method call. Each function parameter can have a default value. It might be any value that matches a specified type, including null. This way we can simply define functions that can be called in multiple ways. This is an example of a function with default values:

    fun printValue(value: String, inBracket: Boolean = true,                    prefix: String = "", suffix: String = "") { 
        print(prefix) 
        if (inBracket) { 
            print("(${value})") 
        } else { 
            print(value) 
        } 
        println(suffix) 
    } 

We can use this function the same way as a normal function (a function without ...