This article is mainly about Ruby beginner notes Hello World, this article is a ruby self-study note, this article in the common method, function, class output Hello world, from one example to understand Ruby programming, need friends can refer to the
Note: Ruby Windows Installer Pack please go to http://rubyinstaller.org/download installation.
Installed a Ruby193, wrote the first Ruby program, to record their own learning bit.
First in Ruby's new folder, sample, and then add a new file, name helloworld.rb
Content is:
The code is as follows:
Puts "hello,world!"
Of course, you can declare a variable first, such as a puts statement
The code is as follows:
A = "hello,world!"
Puts a
Of course, you can also write a function, then call, let it output.
The code is as follows:
def say (name)
"Hello,#{name}"
End
Puts say ("world!")
Given that Ruby is completely object-oriented, you can also write a class, and then tune the object in the class to complete.
The code is as follows:
Class Hello
Attr_reader:msg
DEF initialize
@msg = "Hello, World"
End
End
H = hello.new
Puts H.msg
Print "Press RETURN"
$stdin. Gets
Operation mode, as follows:
The code is as follows:
C:ruby193sample>ruby helloworld.rb
Hello, world!.