round(T::Type, x)
.. round([T,] x, [digits, [base]], [r::RoundingMode])
``round(x)`` rounds ``x`` to an integer value according to the default
rounding mode (see :func:`get_rounding`), returning a value of the same type as
``x``. By default (:obj:`RoundNearest`), this will round to the nearest
integer, with ties (fractional values of 0.5) being rounded to the even
integer.
.. doctest::
julia> round(1.7)
2.0
julia> round(1.5)
2.0
julia> round(2.5)
2.0
The optional :obj:`RoundingMode` argument will change how the number gets rounded.
``round(T, x, [r::RoundingMode])`` converts the result to type ``T``, throwing an
:exc:`InexactError` if the value is not representable.
``round(x, digits)`` rounds to the specified number of digits after the
decimal place (or before if negative). ``round(x, digits, base)`` rounds
using a base other than 10.
.. doctest::
julia> round(pi, 2)
3.14
julia> round(pi, 3, 2)
3.125
.. note::
Rounding to specified digits in bases other than 2 can be inexact when
operating on binary floating point numbers. For example, the ``Float64``
value represented by ``1.15`` is actually *less* than 1.15, yet will be
rounded to 1.2.
.. doctest::
julia> x = 1.15
1.15
julia> @sprintf "%.20f" x
"1.14999999999999991118"
julia> x < 115//100
true
julia> round(x, 1)
1.2Examples
See Also
cmp, float, get_bigfloat_precision, get_rounding, get_zero_subnormals, isapprox, maxintfloat, mod2pi, nextfloat, precision, prevfloat, rationalize, round, set_bigfloat_precision, set_rounding, set_zero_subnormals, significand, with_bigfloat_precision, with_rounding,User Contributed Notes
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