Variables / Arguments evaluation rules in Scala

Evaluation Rules in Scala

Call by Value: Evaluates the function arguments before calling the function

Call by Name: Evaluates the function first and then evaluates the arguments

def example = 2      // evaluated when called

val example = 2      //evaluated immediately

lazy val example = 2 //evaluated once when needed 

def square(x: Double)    // call by value
def square(x: => Double) // call by name
def myFct(bindings: Int*) = { ... } // bindings is a sequence of int,

// containing a varying # of arguments