Basic Scala

In Interactive mode, type:

scala> println("Holla World")

Holla World

scala> 2+3

res1: Int = 5

To use a variable, you need to use var keyword:

scala> var x = 45

a: Int = 45

scala> println(x)
45

scala> var msg = "Holla World From Scala"

scala> println(msg)

Basic Scala