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Rational#round(precision = 0) -> Integer | Rational (9.0)

• 2.2.0
• 2.5.0
• 2.7.0
• 3.0
• 3.1
• 3.2

• インスタンスメソッド

自身ともっとも近い整数を返します。

...y]{
Rational('-123.456').round(+1) # => (-247/2)
Rational('-123.456').round(+1).to_f # => -123.5
Rational('-123.456').round(0) # => -123
Rational('-123.456').round(-1) # => -120
Rational('-123.456').round(-2) # => -100
//}

@see Rational#ceil, Rational#floor, Rational#truncate...

• Rational