What is a Function in Scala?

Functions are expressions that take parameters and sometimes no parameters.

You may define an anonymous function (without a name) that returns a given integer plus five.

(y: Int) => y+5

In the above example, left of the => operator is the list of parameters and on the right is the expressions based on parameters.

Functions can have names as well.

val myFunc = (y: Int) => y+5
println(myFunc(2)) //prints 7

Multiple parameters are specified in a comma-separated list and when it takes no parameters, use empty open/close parenthesis.

val getPI = () => 3.14
println(getPI()) // prints 3.14

Functioons is Scala is similar to Lambda expressions in Java 8.

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