Challenge 2: Single-Expression Functions — Solution

fun isEven(n: Int) = n % 2 == 0

fun max(a: Int, b: Int) = if (a > b) a else b

fun greeting(name: String) = "Hello, $name! Welcome to Kotlin."

fun main() {
    println(isEven(4))
    println(isEven(7))
    println(max(10, 3))
    println(greeting("Philip"))
}

/*
Output:
true
false
10
Hello, Philip! Welcome to Kotlin.

Notes:
- Each function is a single expression after the "=", with no braces and
  no "return" keyword.
- max() uses "if" as an expression (it evaluates to a value), which is
  itself a Kotlin trait carried over from functional-style languages —
  Java's "if" is only a statement, never a value.
- Return types (Boolean, Int, String) are all inferred from the expression
  on the right-hand side, so none are written explicitly.
*/