Gem installation with gem install in Ruby - Mini Project: Build & Apply

Gem installation with gem install

📖 Scenario: You want to use a Ruby gem to add extra features to your Ruby programs. Gems are like apps you can add to Ruby to do new things easily.Before using a gem, you need to install it on your computer using the gem install command.

🎯 Goal: Learn how to install a Ruby gem called colorize using the gem install command and verify it works by writing a simple Ruby script that uses it.

📋 What You'll Learn

Use the gem install colorize command to install the gem

Create a Ruby script that uses the colorize gem

Print colored text using the gem

Run the script to see the colored output

💡 Why This Matters

🌍 Real World

Installing gems lets you add ready-made tools to your Ruby projects, saving time and adding powerful features.

💼 Career

Knowing how to install and use gems is essential for Ruby developers to build modern applications efficiently.

1

Create a Ruby script file

Create a Ruby file called color_test.rb and write this line at the top: require 'colorize'

Ruby

# Create a file named color_test.rb and write the require line
# Your code here

Need a hint?

The require line loads the gem so you can use it in your script.

2

Add a text variable

Add a variable called text and set it to the string 'Hello, Ruby!'

Ruby

require 'colorize'
# Add a variable named text with the value 'Hello, Ruby!'
# Your code here

Need a hint?

Variables hold information you want to use later in your program.

3

Use the gem to color the text

Use the colorize gem to make text appear in red color by calling text.colorize(:red) and save it in a variable called colored_text

Ruby

require 'colorize'
text = 'Hello, Ruby!'
# Create colored_text by coloring text red
# Your code here

Need a hint?

The colorize method changes the text color. Use :red to make it red.

4

Print the colored text

Print the variable colored_text using puts to see the red colored text in the terminal

Ruby

require 'colorize'
text = 'Hello, Ruby!'
colored_text = text.colorize(:red)
# Print colored_text
# Your code here

Need a hint?

Use puts to show the colored text on the screen.