String slicing and indexing in Ruby - Mini Project: Build & Apply

String slicing and indexing

📖 Scenario: You work at a bookstore that keeps book titles in a list. You want to extract parts of these titles to create short labels.

🎯 Goal: Learn how to slice and index strings in Ruby to get parts of book titles.

📋 What You'll Learn

Create a string variable with a book title

Create a variable for the start index

Use string slicing to get a substring

Print the sliced substring

💡 Why This Matters

🌍 Real World

Extracting parts of strings is useful when creating labels, previews, or summaries from longer text.

💼 Career

String slicing is a basic skill needed in many programming jobs, including web development, data processing, and automation.

1

Create a book title string

Create a string variable called book_title and set it to the exact value "The Ruby Programming Language".

Ruby

# Create the string variable 'book_title' with the value "The Ruby Programming Language"
# Your code here

Need a hint?

Use = to assign the string to the variable book_title.

2

Set the start index for slicing

Create a variable called start_index and set it to the exact number 4.

Ruby

book_title = "The Ruby Programming Language"
# Create the variable 'start_index' and set it to 4
# Your code here

Need a hint?

Remember to use = to assign the number 4 to start_index.

3

Slice the string to get a substring

Create a variable called short_label that slices book_title starting at start_index and takes exactly 4 characters.

Ruby

book_title = "The Ruby Programming Language"
start_index = 4
# Slice 'book_title' from 'start_index' taking 4 characters and assign to 'short_label'
# Your code here

Need a hint?

Use string[start, length] syntax to slice the string.

4

Print the sliced substring

Write a puts statement to print the value of short_label.

Ruby

book_title = "The Ruby Programming Language"
start_index = 4
short_label = book_title[start_index, 4]
# Print the value of 'short_label'
# Your code here

Need a hint?

Use puts short_label to display the substring.