15.2 How to Declare a Kotlin Function

A Kotlin function is declared using the following syntax:

fun <function name> (<para name>: <para type>, <para name>: <para type>, ... ): <return type> {

         // Function code

}

This combination of function name, parameters and return type are referred to as the function signature or type. Explanations of the various fields of the function declaration are as follows:

•fun – The prefix keyword used to notify the Kotlin compiler that this is a function.

•<function name> - The name assigned to the function. This is the name by which the function will be referenced when it is called from within the application code.

•<para name> - The name by which the parameter is to be referenced in the function code.

•<para type> - The type of the corresponding parameter.

•<return type>...