why -7 / 3 = -3 in ruby ??

Question

puts (-7/3) produce -3

Answer 1

-7/3 = -3
-7.0/3 = -2.333

Great question :)

The rule is that without having the decimal fraction point, ".", all the results are presented in floor function mode, which mathematically is the largest integer smaller than the result:

[x] = max{ n ∈ Z | n<= x }

Answer 2

because rule of signs: -/+ = -