once you consider overflow and underflow You're explicitly comparing apples and oranges here. Are you implying that it's never necessary to check for overflow

once you consider overflow and underflow You're explicitly comparing apples and oranges here. Are you implying that it's never necessary to check for overflow and underflow in dynamically typed languages, and that it's somehow mandatory to do so in statically typed ones? Or, in case your argument is "numbers in dynamically typed languages do not overflow", are you aware of BigDecimal in Java or sys.maxint in Python 2?