Scala learns Day01 Scala classes/Methods/objects/Singleton objects

Starting today, I will try my best to learn the language of Scala in a systematic way, hoping that I can keep on going.

classes in Scala

Define a rule class classname{//member of Class} in the class definition, you can place fields and methods, which are loosely referred to as member Scala's method definition rules def methodName (arg1:int,arg2:int): unit={// In Function}scala, an important feature of the method parameters is that they are all Val, so it is not possible to re-assign parameters in a method in the Scala method, you should avoid using the return statement, especially multiple return statements, instead of each method as the expression that creates the return value. Singleton object Singleton object definition looks consistent with class definition

Scala learns Day01 Scala classes/Methods/objects/Singleton objects