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fixed round(fixed x)
Rounds x to the nearest integer and returns the result as a fixed-point number.
See the article on Rounding for all rounding modes.
round(2.3) -> 2.0 round(3.8) -> 4.0 round(5.5) -> 6.0 round(-2.3) -> -2.0 round(-3.8) -> -4.0 round(-5.5) -> -5.0