arguments starting at ``0``).

-.. function:: round(~~x[, n~~])

+.. function:: round(number[, ndigits])

- Return the floating point value *x* rounded to *n* digits after the decimal

- point. If *n* is omitted, it defaults to zero. Delegates to

+ Return the floating point value *number* rounded to *ndigits* digits after

+ the decimal point. If *ndigits* is omitted, it defaults to zero. Delegates

+ to ``number.__round__(ndigits)``.

For the built-in types supporting :func:`round`, values are rounded to the

- closest multiple of 10 to the power minus *n*; if two multiples are equally

- close, rounding is done toward the even choice (so, for example, both

- ``round(0.5)`` and ``round(-0.5)`` are ``0``, and ``round(1.5)`` is ``2``).

- The return value is an integer if called with one argument, otherwise of the

+ closest multiple of 10 to the power minus *ndigits*; if two multiples are

+ equally close, rounding is done toward the even choice (so, for example,

+ both ``round(0.5)`` and ``round(-0.5)`` are ``0``, and ``round(1.5)`` is

+ ``2``). The return value is an integer if called with one argument,

+ otherwise of the same type as *number*.