Hello World, rubyhello for Ruby beginners

Hello World, rubyhello for Ruby beginners

NOTE: For the Ruby Windows installation package, go to http://rubyinstaller.org/download to install it.

I installed Ruby193 and wrote the first Ruby program to record my learning experience.
Create a folder Sample in Ruby and add a new file named HelloWorld. rb.
The content is:
Copy codeThe Code is as follows:
Puts "Hello, World! "

Of course, you can declare the variable first, for example, then use the puts statement.
Copy codeThe Code is as follows:
A = "Hello, World! "
Puts

Of course, you can also write a function before calling it for output.
Copy codeThe Code is as follows:
Def say (name)
"Hello, # {name }"
End

Puts say ("World! ")

Considering that Ruby is fully object-oriented, you can also write a class and then call the object method in the class to complete the process.
Copy codeThe 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

Run as follows:
Copy codeThe Code is as follows:
C: \ Ruby193 \ Sample> ruby HelloWorld. rb
Hello, World!