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'
}