[RUBY] Class and instant part2

As a premise

There are two types of methods ・ What is prepared in Ruby (gets / puts / chomp / to_i etc.) ・ What you make yourself Divide into

class

An image of what kind of program to make ·name of the class ・ Class method ・ Class variables Let's think separately (I couldn't distinguish)

When creating a class method Can be used when repeating common processing or counting up

instance

Since instance variables are processed individually Instance creation is created when you want to process individually sorted

self./@/@@/initialize

self. → Class method

@ → Instance variable

@@ → Class variables

initialize → Here is where you want to make initial settings

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