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Scala Methods and Functions
Scala has methods and functions, and the semantic difference between the two is very small. A Scala method is part of a class, while a function is an object that can be assigned to a variable. In other words, a function defined in a class is a method.
Methods in Scala are similar to those in Java; they are part of a class.
Functions in Scala are complete objects; a function in Scala is actually an object of a class that inherits from a Trait.
In Scala, you can define a function using the val statement, and a method using the def statement.
class Test{
def m(x: Int) = x + 3
val f = (x: Int) => x + 3
}
Note: In some translations, there is no distinction between function and method
class Test{
def m(x: Int) = x + 3
val f = (x: Int) => x + 3
}