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End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

BigDecimal#to_d

a.to_d → bigdecimal

Returns self.

Example
require 'bigdecimal/util'

d = BigDecimal("3.14")
d.to_d                       # => 0.314e1
See also #sub #to_digits #sqrt #to_f also in 3.3 · 3.1 · 3.0