The difference between scala script and application

Question

What is the difference between a scala script and scala application? Please provide an example

The book I am reading says that a script must always end in a result e

Answer 1

Well, I always thought this is a Scala script:

$ cat script

#!/usr/bin/scala
!#

println("Hello, World!")

Running with simple:

$ ./script

An application on the other hand has to be compiled to .class and executed explicitly using java runtime.