Ruby Beginner notes of Hello World

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!.