Ruby Integer::MAX and Integer::MIN

integer.rb

class Integer
  N_BYTES = [42].pack('i').size
  N_BITS = N_BYTES * 16
  MAX = 2 ** (N_BITS - 2) - 1
  MIN = -MAX - 1
end

p Integer::MAX              #=> 4611686018427387903
p Integer::MAX.class        #=> Fixnum
p (Integer::MAX + 1).class  #=> Bignum

The number of bits in a byte is 8, not 16. So, shouldn't line 3 read N_BITS = N_BYTES * 8?
which makes the rest incorrect.

The maximum unsigned integer, with 4 bytes, is 2**32 - 1 => 4294967295
The maximum signed integer, with 4 bytes, is 2**31 - 1 => 2147483647

right on! 🏄‍♂️