builtins/big_integers/arithmetic.rb

tests/_examples/builtins/big_integers/arithmetic.rb in the metorex repository.

# An Integer grows past the machine word rather than saturating or turning
# into a Float. Ruby draws no line between the two sizes.

powers = [2 ** 64, 2 ** 100]
puts powers.inspect

literal = 18446744073709551616
puts literal.class.to_s
puts (literal == 2 ** 64).to_s

sums = [9223372036854775807 + 1, 9223372036854775807 * 2, -9223372036854775807 - 2]
puts sums.inspect

big = 2 ** 64
round_trip = big * 42 / big
puts round_trip.to_s
difference = big - big
puts difference.to_s
puts difference.class.to_s

puts (big > 2 ** 63).to_s
puts (big <=> 2 ** 63).to_s
mixed = [big, 1, -big, 3]
puts mixed.sort.inspect

puts big.abs.to_s
negative = -big
puts negative.abs.to_s
puts big.even?.to_s
puts big.succ.to_s
puts big.bit_length.to_s
puts big.divmod(1000).inspect
puts (big >> 32).to_s
puts (~big).to_s

truncated = 2e100.to_i
puts truncated.class.to_s
puts Integer("340282366920938463463374607431768211456").to_s

ratio = Rational(big, 3)
puts ratio.numerator.to_s
puts ratio.denominator.to_s

# Two separately built values of the same size are separate objects.
first = 2e100.to_i
second = 2e100.to_i
puts (first == second).to_s
puts first.equal?(second).to_s
puts big.frozen?.to_s

Output:

[18446744073709551616, 1267650600228229401496703205376]
Integer
true
[9223372036854775808, 18446744073709551614, -9223372036854775809]
42
0
Integer
true
1
[-18446744073709551616, 1, 3, 18446744073709551616]
18446744073709551616
18446744073709551616
true
18446744073709551617
65
[18446744073709551, 616]
4294967296
-18446744073709551617
Integer
340282366920938463463374607431768211456
18446744073709551616
3
true
false
true