Scala Programming Projects

Declaring and calling functions

A Scala function takes 0 to n parameters and returns a value. The type of each parameter must be declared. The type of the returned value is optional, as it is inferred by the Scala compiler when not specified. However, it is a good practice to always specify the return type, as it makes the code more readable:

scala> def presentation(name: String, age: Int): String =   "Hello, my name is " + name + ". I am " + age + " years old."presentation: (name: String, age: Int)Stringscala> presentation(name = "Bob", age = 25)res1: String = Hello, my name is Bob. I am 25 years old.scala> presentation(age = 25, name = "Bob")res2: String = Hello, my name is Bob. I am 25 years old.

We can call a function by passing arguments ...