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RUBY - INSTALLATION

To run Ruby Programms in you PC, you need to install Ruby first.

Installation of Ruby for Windows OS

Below are the steps to install Ruby on Windows OS :

Goto the below link and download the latest version of Ruby.

https://www.ruby-lang.org/en/downloads/

Then double click on the exe file and install Ruby in your PC.

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Once Ruby is Installed, you can open the Command Prompt and Type ruby -v. If the version is shown then Ruby is successfully installed in your system.

Installation of Ruby for MAC OS

Below are the steps to install Ruby on MAC OS :

In MAC OS, Ruby can be installed using RVM(Ruby Version Manager).

Goto the below link and download the latest version of Ruby.

https://rvm.io

Then copy the commands and paste in the Terminal to Install Ruby.

Once Ruby is Installed, you can open the Command Prompt and Type ruby -v.If the version is shown then Ruby is successfully installed in your system.

Now, that we have Installed Ruby. Let us see how we can run a Ruby Program.

Running a Ruby Program in Windows OS

Let us write a Program that will print Hello World.

The first thing we will do is open Notepad in Windows OS.

Once Notepad is opened. You can type the lines of code there.

And now, since we are trying to print Hello World. One line of code is enough in Ruby.
```
puts "Hello World.";
```

Then save with .rb extension. Say FirstProgram.rb.

Then run using the command ruby FirstProgram.rb.

And we are done.

Running a Ruby Program in MAC OS

Let us write a Program that will print Hello World.

The first thing we will do is open TextEdit in MAC.

Once TextEdit is opened. You can type the lines of code there.

And now, since we are trying to print Hello World. One line of code is enough in Ruby.
```
puts "Hello World.";
```

Then save with .rb extension. Say FirstProgram.rb.

Then run using the command ruby FirstProgram.rb.

And we are done.

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