Why Ruby prefers iterators over loops - See It in Action

Why Ruby Prefers Iterators Over Loops

📖 Scenario: Imagine you have a list of fruits and you want to print each fruit's name. In Ruby, you can do this using loops or iterators. Ruby prefers iterators because they are simpler and safer to use.

🎯 Goal: You will create a list of fruits, set up a counter, use an iterator to print each fruit with its position, and finally display the output.

📋 What You'll Learn

Create an array called fruits with these exact values: 'apple', 'banana', 'cherry'

Create a variable called index and set it to 1

Use the each iterator on fruits with a block variable fruit to print the index and fruit name, then increment index by 1

Print the output exactly as shown

💡 Why This Matters

🌍 Real World

Iterators are used in Ruby programs to process lists of data like user names, product lists, or messages efficiently and clearly.

💼 Career

Understanding iterators helps you write clean, maintainable Ruby code, which is essential for Ruby developers working on web apps, automation scripts, or data processing.

1

Create the fruits array

Create an array called fruits with these exact values: 'apple', 'banana', 'cherry'

Ruby

# Create the fruits array
# Your code here

Need a hint?

Use square brackets [] to create an array and separate items with commas.

2

Set up the index counter

Create a variable called index and set it to 1

Ruby

fruits = ['apple', 'banana', 'cherry']
# Create the index variable and set it to 1
# Your code here

Need a hint?

Just write index = 1 to start counting from 1.

3

Use the each iterator to print fruits with index

Use the each iterator on fruits with a block variable fruit to print the index and fruit name, then increment index by 1 inside the block

Ruby

fruits = ['apple', 'banana', 'cherry']
index = 1
# Use each iterator to print index and fruit, then increment index
# Your code here

Need a hint?

Use fruits.each do |fruit| ... end and inside the block print the index and fruit, then add index += 1.

4

Display the final output

Run the program to print the fruits with their index using the iterator

Ruby

fruits = ['apple', 'banana', 'cherry']
index = 1
fruits.each do |fruit|
  puts "#{index}: #{fruit}"
  index += 1
end
# Run the program to see output

Need a hint?

Just run the program. You should see each fruit printed with its number.