Kotlin Programming: The Big Nerd Ranch Guide, First Edition

Calling a Function

IntelliJ not only generated the formatHealthStatus function, but it also added a line in place of the code it extracted:

    fun main(args: Array<String>) {
       val name = "Madrigal"
       var healthPoints = 89
       var isBlessed = true
       ...
       val healthStatus = formatHealthStatus(healthPoints, isBlessed)
       ...
    }

This line is a function call, which triggers the function to perform whatever actions are defined in its body. You call a function with its name, along with data to satisfy any parameters required by the function header.

Compare the function header for formatHealthStatus with its corresponding function call:

 formatHealthStatus(healthPoints: Int, isBlessed: Boolean): String // Header formatHealthStatus(healthPoints, isBlessed) ...