Ruby - Case Statement

1. Introduction

In Ruby, the case statement provides an alternative to multiple if-elsif conditions, enabling developers to create more readable and concise code for multiple checks against a single value. This guide will explore how to implement and use the case statement in Ruby.

2. Program Steps

1. Define a variable with a value.

2. Use a case statement to match the variable's value against several conditions.

3. For each condition, specify a code block to execute.

4. Optionally, define an else within the case statement as a fallback if none of the conditions are met.

5. Print out relevant messages based on the matched condition.

3. Code Program

# Defining a variable with a value
fruit = "apple"
# Using case statement to match the fruit's value
case fruit
when "apple"
  puts "It's an apple!"
when "banana"
  puts "It's a banana!"
when "cherry"
  puts "It's a cherry!"
  puts "It's not a fruit we recognize."


It's an apple!


1. The variable fruit is assigned the value "apple".

2. The case statement checks the value of fruit against its when conditions.

3. The value "apple" matches the first when condition: when "apple".

4. The corresponding code block is executed, printing the message "It's an apple!".

5. If the fruit variable held a value not listed in any of the when conditions, the code within the else block would execute, printing "It's not a fruit we recognize."

The case statement simplifies the process of checking a single variable against multiple potential values, offering a cleaner and more readable approach compared to several if-elsif statements.