Write the first program in Ruby

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:

Puts "Hello, World! "

Of course, you can declare the variable first, for example, then use the puts statement.

A = "Hello, World! "Puts

Of course, you can also write a function before calling it for output.

Def say (name) "Hello, # {name}" endput 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.

Class Hello attr_reader: msg def initialize @ msg = "Hello, World" endendh = Hello. newputs h. msuplint "Press RETURN" $ stdin. gets

Run as follows:

C: \ Ruby193 \ Sample> ruby HelloWorld. rbHello, World!