#!/usr/bin/ruby

# 커널

=begin

* caller
* class
* frozen?
* global_variables
* local_variables
* test

=end

## IO

=begin

* gets
* open
* p
* print
* printf
* putc
* puts
* readline
* readlines
* select

=end




=begin

* eval

=end

a = eval "1 + 2" # 문자열을 스크립트 명령문으로 처리합니다.
p a # 3




END{
  # https://ruby-doc.org/3.3.0/Kernel.html
  # https://ruby-doc.org/3.3.0/ENV.html
}
