IntelliJ IDEA 2021.2 Help

Create and run your first Ruby project

This tutorial will show you how to create and run the simple interactive Ruby program in IntelliJ IDEA.

Before starting this tutorial, do the following:

We'll perform all steps using IntelliJ IDEA installed on macOS.

Create an empty application

To create a Ruby program from scratch, do the following:

  1. Run IntelliJ IDEA and click New Project on the Welcome Screen.

  2. In the New Project dialog, select Ruby on the left pane. Then, select a required Ruby interpreter in Project SDK. Click Next.

    New project dialog / Ruby
  3. On the next page, specify the project name and location. Click Finish.

    New project dialog

Create a Ruby file

After creating a project, you will see its structure in the Project tool window on the left. To add a Ruby file, do the following:

  1. Select a project root in the Project tool window and press Alt+Insert.

  2. In the invoked popup, select Ruby File/Class and press Enter.

  3. In the invoked popup, specify a script name (script in our case) and click OK.

    New Ruby File/Class
  4. In the editor, insert the following code:

    puts "Please enter your name" name = gets.chomp puts "Hello, #{name}! I'm Ruby!"

Run an application

To run the created script, do the following:

  1. Press Ctrl twice and type the following command:

    ruby script.rb

    Press Enter.

    Run ruby script
  2. In the Run tool window, type any name and press Enter to see a program's response.

    Run ruby script
Last modified: 31 August 2021