Multiple rescue clauses in Ruby - Mini Project: Build & Apply

Handling Errors with Multiple Rescue Clauses in Ruby

📖 Scenario: Imagine you are writing a small program that divides numbers. Sometimes, the user might enter zero or a wrong input, causing errors. You want to handle these errors nicely so the program doesn't crash.

🎯 Goal: You will build a Ruby program that divides two numbers and uses multiple rescue clauses to handle different types of errors separately.

📋 What You'll Learn

Create two variables with exact values for numerator and denominator

Create a variable called result initialized to nil

Use a begin block to perform division

Add multiple rescue clauses to handle ZeroDivisionError and TypeError

Print the result or an error message

💡 Why This Matters

🌍 Real World

Handling errors gracefully is important in real programs to avoid crashes and give helpful messages to users.

💼 Career

Knowing how to use multiple rescue clauses helps you write robust Ruby code that can handle different problems clearly.

1

Set up numerator and denominator variables

Create a variable called numerator and set it to 10. Create another variable called denominator and set it to 0.

Ruby

# Create numerator and denominator variables with values 10 and 0
# Your code here

Need a hint?

Use simple assignment like numerator = 10 and denominator = 0.

2

Initialize result variable

Create a variable called result and set it to nil.

Ruby

numerator = 10
 denominator = 0
# Initialize result variable to nil
# Your code here

Need a hint?

Use result = nil to start with no value.

3

Add begin block with multiple rescue clauses

Write a begin block where you set result to numerator / denominator. Add two rescue clauses: one for ZeroDivisionError that sets result to the string "Cannot divide by zero", and one for TypeError that sets result to "Invalid types for division".

Ruby

numerator = 10
 denominator = 0
result = nil
# Add begin block with multiple rescue clauses
# Your code here

Need a hint?

Use begin and rescue keywords to catch errors separately.

4

Print the result

Write puts result to display the value of result.

Ruby

numerator = 10
 denominator = 0
result = nil
begin
  result = numerator / denominator
rescue ZeroDivisionError
  result = "Cannot divide by zero"
rescue TypeError
  result = "Invalid types for division"
end
# Print the result
# Your code here

Need a hint?

Use puts result to show the output.