Functions

Functions

Functions in Scala are defined with def. The return type comes after : and the body after =:

def add(a: Int, b: Int): Int = a + b
println(add(3, 4))  // 7

For multi-statement bodies, use curly braces:

def greet(name: String): String = {
  val message = "Hello, " + name
  message + "!"
}

Default Parameters

Functions can have default values:

def power(base: Int, exp: Int = 2): Int = {
  var result = 1
  for (i <- 1 to exp) result *= base
  return result
}
power(3)     // 9  (uses default exp=2)
power(2, 10) // 1024

Your Task

Write a function area that takes width and height (both Int) and returns their product.