Running scripts with ruby command - Mini Project: Build & Apply

Running Ruby Scripts with the ruby Command

📖 Scenario: You want to learn how to run simple Ruby scripts using the ruby command in the terminal. This is useful when you write Ruby code in a file and want to see the output by running it.

🎯 Goal: Learn how to create a Ruby script file, add a simple Ruby program, and run it using the ruby command to see the output.

📋 What You'll Learn

Create a Ruby script file named greeting.rb

Write a Ruby program that prints a greeting message

Use the ruby command to run the script and display the output

💡 Why This Matters

🌍 Real World

Running Ruby scripts from files is how developers test and run their Ruby programs in real projects.

💼 Career

Knowing how to run Ruby scripts with the ruby command is essential for Ruby developers, testers, and anyone working with Ruby code.

1

Create a Ruby script file with a greeting message

Create a Ruby script file named greeting.rb and write this exact line of code inside it: puts "Hello, Ruby!"

Ruby

# Create a file named greeting.rb and write the code below
# puts "Hello, Ruby!"

Need a hint?

Use a text editor to create a file named greeting.rb and type puts "Hello, Ruby!" inside it.

2

Add a variable to store the greeting message

In the greeting.rb file, add a variable named message and set it to the string "Hello, Ruby!". Then use puts message to print it.

Ruby

message = "Hello, Ruby!"
puts message
# Your code here

Need a hint?

Assign the string to message and then print it with puts message.

3

Run the Ruby script using the ruby command

Open your terminal or command prompt and run the command ruby greeting.rb to execute the script and see the output.

Ruby

# Run the script in your terminal with: ruby greeting.rb

Need a hint?

Use the terminal command ruby greeting.rb to run your script file.

4

Display the output of the Ruby script

Print the output of running ruby greeting.rb. It should show the exact text: Hello, Ruby!

Ruby

# Print the output below
# Your code here

Need a hint?

When you run ruby greeting.rb, the terminal should display Hello, Ruby!.