Comprehensive Ruby Programming

Error handling tutorial

In this guide, we will discuss error handling in Ruby. Error handling is important to know when your application has run into a bug, so that you know how to fix it accordingly.

To see how it works, let's start with creating a line of code that will generate an error:

puts 8/0 

If you execute it, your application will throw an error:

error_handling.rb:1:in `/': divided by 0 (ZeroDivisionError)   from error_handling.rb:1:in `<main>' 

This code is attempting to divide by zero (which isn't possible), so it's running into ZeroDivisionError. To handle this error in a more elegant way, the syntax is as follows:

begin   puts 8/0 rescue   puts "Rescued the error" end 

If you run this code, the program will print out Rescued the ...