Challenge 1: val vs var in Practice — Solution

fun main() {
    val myName = "Philip"
    var counter = 0

    counter = counter + 1
    println("$myName's counter: $counter")

    counter += 1
    println("$myName's counter: $counter")

    counter += 1
    println("$myName's counter: $counter")

    // myName = "Someone else"   // Compile error: Val cannot be reassigned
}

/*
Output:
Philip's counter: 1
Philip's counter: 2
Philip's counter: 3

Notes:
- counter is a var, so it can be reassigned three times.
- myName is a val — uncommenting the reassignment line produces a compiler
  error ("Val cannot be reassigned"), not a runtime error. Kotlin catches
  this at compile time, before the program ever runs.
*/