raising_exceptions

🚩 Raise custom exceptions

Use raise to signal errors manually and define custom exception classes by inheriting from StandardError. This helps communicate error conditions clearly within your code.

def divide(a, b)
  raise ArgumentError, 'Division by zero' if b.zero?
  a / b
end

begin
  divide(10, 0)
rescue ArgumentError => e
  puts e.message
end

class MyError < StandardError; end

def do_work
  raise MyError, 'Something went wrong'
end

begin
  do_work
rescue MyError => e
  puts e.message
end