IO.print(1..3) // expect: 1..3
IO.print(12345.6789..12345.6789) // expect: 12345.6789..12345.6789
IO.print(-100..-300) // expect: -100..-300

IO.print(1...3) // expect: 1...3
IO.print(12345.6789...12345.6789) // expect: 12345.6789...12345.6789
IO.print(-100...-300) // expect: -100...-300