In Scala, difference between final val and val [duplicate]

Question

In Scala, what is the difference between

val a = 1 

and

final val fa = 1 

Answer 1

final members cannot be overridden, say, in a sub-class or trait.

Legal:

class A {     val a = 1 }  class B extends A {     override val a = 2 } 

Illegal:

class A {     final val a = 1 }  class B extends A {     override val a = 2 } 

You'll get an error such as this:

:9: error: overriding value a in class A of type Int(1);

value a cannot override final member