Scala Reactive Programming

Scala functions

In general, a function is an operation that takes some inputs, processes them, and returns results. It is the same for the Scala language too. Take a look at the following diagram:

Sometimes, a function is also known as an operation, routine, procedure, or method, depending on the context in which we use it.

In Scala, we can define a function using def, as shown here:

def add (a: Int, b: Int) : Int = a + b 

Here, the add function has two inputs, a and b, of the same type, Int, and returns Int as a result.

Scala supports some syntactic sugar to write the same function in different ways:

def add (a: Int, b: Int) : Int = { a + ...