Ruby Conditional Statements Examples

Introduction to Ruby Conditional Statements

Conditional statements in Ruby allow you to execute code based on certain conditions. They enable your programs to make decisions, improving their functionality and responsiveness. In this article, we will explore three diverse and practical examples of Ruby conditional statements that illustrate their usage in real-world scenarios.

Example 1: Simple Age Check

Context

In many applications, you may need to check a user’s age to grant access to certain content or features. This example demonstrates how to implement a simple age verification system.

Example

age = 20

if age < 18
  puts "You are a minor."
elsif age >= 18 && age < 65
  puts "You are an adult."
else
  puts "You are a senior citizen."
end

Notes

• This example uses if, elsif, and else to categorize the user’s age.
• You can easily modify the age ranges to suit your application’s requirements.

Example 2: Weather-Based Clothing Recommendation

Context

This example shows how to provide clothing recommendations based on the current weather conditions. It helps users decide what to wear based on temperature and weather type.

Example

temperature = 15  # in degrees Celsius
weather = "rainy"

if temperature < 10
  puts "Wear a heavy coat and boots."
elif temperature < 20 && weather == "rainy"
  puts "A light jacket and an umbrella will do."
elif temperature >= 20 && weather == "sunny"
  puts "It's warm, wear a t-shirt and shorts!"
else
  puts "Dress comfortably for the weather!"
end

Notes

• The example combines multiple conditions to give a more tailored recommendation based on both temperature and weather type.
• You can extend this by adding more weather conditions or clothing options.

Example 3: User Role-Based Access Control

Context

In web applications, it is common to restrict access to certain features based on user roles. This example illustrates how to implement role-based access control using conditional statements.

Example

user_role = "editor"

case user_role
when "admin"
  puts "Access granted: You have full permissions."
when "editor"
  puts "Access granted: You can edit content."
when "viewer"
  puts "Access granted: You can view content."
else
  puts "Access denied: You do not have permission."
end

Notes

• This example utilizes the case statement for cleaner syntax when dealing with multiple conditions.
• You can easily add or modify user roles and their corresponding permissions.

These examples of Ruby conditional statements illustrate how you can implement decision-making capabilities in your code. By understanding and utilizing these concepts, you can enhance the interactivity and user experience of your applications.