Yield to execute blocks in Ruby - Mini Project: Build & Apply

Yield to Execute Blocks

📖 Scenario: You are creating a simple Ruby program that uses yield to run blocks of code passed to a method. This is like giving your method a little helper to do extra work when you call it.

🎯 Goal: Build a Ruby method that uses yield to execute a block, and see how the block runs inside the method.

📋 What You'll Learn

Create a method called greet that uses yield

Pass a block to greet that prints a greeting message

Call the greet method with the block

Print the output of the block execution

💡 Why This Matters

🌍 Real World

Using <code>yield</code> lets Ruby methods run extra code blocks, which is useful for customizing behavior like logging, repeating tasks, or handling events.

💼 Career

Understanding <code>yield</code> is important for Ruby developers because many Ruby libraries and frameworks use blocks to make code flexible and clean.

1

Create the greet method

Write a method called greet that prints "Hello!" inside it.

Ruby

# Your code here

Need a hint?

Use def greet to start the method and puts "Hello!" to print inside it.

2

Add yield inside greet

Add yield inside the greet method after the puts "Hello!" line.

Ruby

def greet
  puts "Hello!"
  # Your code here
end

Need a hint?

Just write yield on a new line inside the method after the greeting.

3

Call greet with a block

Call the greet method and pass a block that prints "Nice to meet you!".

Ruby

def greet
  puts "Hello!"
  yield
end

# Your code here

Need a hint?

Call greet with curly braces and inside them write puts "Nice to meet you!".

4

Run the program and see the output

Run the program and print the output. The program should print Hello! and then Nice to meet you! on separate lines.

Ruby

def greet
  puts "Hello!"
  yield
end

greet { puts "Nice to meet you!" }
# Your code here

Need a hint?

Just run the program. It should print two lines: Hello! and Nice to meet you!.