Sample of how to create meaningful names

MeaningfulNames.kt

// Bad variables naming
var a = 0 // user ages
var w = 0 // user weight
var h = 0 // user height


// Bad functions naming
fun age()
fun weight()
fun height()


// Bad classes naming to get user data
class UserInfo()


// Best practices varibales naming
var userAge = 0
var userWeight = 0
var userHeight = 0


// Best practices functions naming
fun setUserAge()
fun setUserWeight()
fun setUserHeight()


// Best practices classes naming to get user data
class User()

The user prefix is redundant if these are variables/functions of the User class.

Also, maybe you should change signature of "setUser..." and insert parameters. Like:

fun setUserAge(newAge: Int)
fun setUserWeight(newWeight: Int)
fun setUserHeight(newHeight: Int)