I was wondering, how can I check if a number isn't whole, or contains a decimal or fraction. How can I do this?
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How can I check if a number isn't whole?
1 answer
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A whole number modulo 1 is 0:
if num % 1 == 0 then
-- Whole number
else
-- Not whole
end
Modulo is remainder after division.
If x mod y (Lua use % as an operator) is congruent to u if u + ky = x for an integral k and 0 < u < y. E.g., 2.1 mod 0.5 is 0.1 since it's .1 more than .5 * 4.
We could also compare the number to its own floor. The floor of 2 is 2; the floor of 3.01 is 3.
if math.floor(num) == num then
-- Whole
else
-- Not whole
end
(If we define floor as x - (x % 1) then we see this is equivalent to the first)
Another option, though a bad one, is to use the string representation of the number (this is complicated Lua using exponential notation on larger numbers)
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Ah, thanks!
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What you can do compair it with itself using a math.Floor() What that does is make the number whole. (It rounds it down) If you provide the script, I can most likely edit it for you to fit what you need.