Hello, I’m trying to make a modulus function but adjust the values a little.
I know well what modulus is and what it does but I can’t find the equation it uses.
I found out that its something like this:
a - b * math.floor(a / b) but this example is from other coding languages.
I don’t know what equation luau uses because it has some differences when using negative numbers with modulus to other languages.
Any help appreciated!
I can’t find any documentation where the difference in behavior from other languages is explained.
I don’t think lua uses a different equation.
I ran this code and
a%b == a - b * math.floor(a / b) was true in all a and b combinations (except when b = 0, both sides of the equation were
nan (undefined) and
nan == nan is false for some reason):
for a = -100, 100 do
for b = -100, 100 do
if a%b ~= a - b * math.floor(a / b) then
print(a - b * math.floor(a / b))
I tested your code and it works like you said.
Weird, I think some of my numbers might have bugged out or something.
I think it has to do with this difference:
I would try looking at the open source Luau code to see how they implemented it in C++
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