val and var - the good and the the ugly

gistfile1.scala

object ScalaHackSession {
	val immutable: String = "Hello, Scala"    //> immutable  : String = Hello, Scala
	var mutable = immutable                   //> mutable  : String = Hello, Scala
	mutable = "Hello, Hacker"
	println(mutable)                          //> Hello, Hacker
}