Lazy Val : Example

scala> // #PS:89

scala> // psn > a30 > a70

scala> // Use Lazy Val when we want to defer

scala> //   initializing some LARGE data only when it is needed

scala> //   (ie the first time it has been used)

scala> // Do not use Lazy val for small value initialization

scala> //   as creating lazy val has overhead associated with it

scala> def getNo():Int = {
     |   println("Inside method getNo()")
     |   5    
     | }
getNo: ()Int

scala> // Note here... getNo() is NOT called at this time

scala> lazy val no = getNo()
no: Int = 

scala> //getNo() is called NOW (Lazily evaluaeted)

scala> val result = no + 6
Inside method getNo()
result: Int = 11

scala> // getNo() is not called here(ie getNo() is called only once)

scala> val result = no + 11
result: Int = 16