def divide(x, y) 
    begin
        result = x / y
        puts "result is", result
    rescue ZeroDivisionError
        puts "division by zero!"
        raise "division by zero"
    ensure 
        puts "executing finally clause"
    end
end

puts "====="
divide(2, 1)
puts "====="
divide(2, 0)
puts "====="

Line 7:in `divide': division by zero (RuntimeError)
	from t.rb:16
=====
result is
2
executing finally clause
=====
division by zero!
executing finally clause