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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#<

self < other → true or false

Returns true if self is less than other, false otherwise:

Example
b = BigDecimal('1.5') # => 0.15e1
b < 2                 # => true
b < 2.0               # => true
b < Rational(2, 1)    # => true
b < 1.5               # => false

Raises an exception if the comparison cannot be made.

See also #<= #/ #-@ #<=> also in 3.3 · 3.1 · 3.0