This is one example of how the solution could look like.
Of course, you could have used different names for the variables.

fun main(){

  var courseName :String = "Android Masterclass"

  val leet : Float = 13.37F

  val pi : Double = 3.14159265358979

  var age : Byte = 25 

  var year : Short = 2020

  var phoneNumber: Long = 18881234567

  var isGood : Boolean = true

  var firstCharacter : Char = 'a'

}