카타 8급 Convert a Number to a String!

1 JavaScript

function numberToString(num) {
  return num.toString();
}

function numberToString(num) {
  return String(num);
}

function numberToString(num) {
  return ''+num;
}

2 Kotlin

fun numberToString(num: Int): String {
  return num.toString()
}

fun numberToString(num: Int) = num.toString()

var numberToString = {it:Int -> it.toString()}

fun numberToString(num: Int) = "$num"

fun numberToString(num: Int): String {
  return "${num}"
}

3 PHP

function numberToString($num) {
  return (string) $num;
}

function numberToString($num) {
  return ''.$num;
}