Ruby | Rational round() function

The round() is an inbuilt function in Ruby returns rational rounded to the nearest value with a precision of ndigits decimal digits. ndigits by default is 0. It returns a rational when ndigits is positive, otherwise returns an integer.

Syntax: rational.round(ndigits)

Parameters: The function accepts a single parameter

Return Value: It returns rational rounded to the nearest value with a precision of ndigits decimal digits.

Example 1:

# Ruby program for round() method

# Initialize rational number
rat1 = Rational(-4, 3)

# Prints the rational number
puts rat1.round()

Output:

-1

Example 2:

# Ruby program for round() method

# Initialize rational number
rat1 = Rational('123.456')

# Prints the rational number
puts rat1.round(1)
puts rat1.round(-1)

Output:

247/2
120