What is math.abs exactly doing?
It does return the absolute value then 1.33333 might be 1 and 1.99999 might be 2. Or am I wrong.
but when does it round the absolute value?
4 Likes
It’s usually to convert a negative number to a positive one
print(math.abs(1)) --Prints 1
print(math.abs(-1)) -- Prints 1
The thign you’re mentioning is math.round
17 Likes
math.abs() is a built-in lua method (function), that enables you to find an absolute value.
What is an absolute value? It is a aboslute, non-negative value of any real number.
x = -5 ; |x| = 5
y = 5 ; |y| = 5
Read more about absolute values here: Absolute value - Wikipedia.
EDIT @Iwantbebetter
Rounding is a different operation.
It is basically shortening of a number to approximate value that is closer to integer values, e.g. 1.6 is close to 2; 1.4 is close to 1.
Positive values:
math.round(1.4) --> 1
math.round(1.5) --> 2
Negative values:
math.round(-2.4) --> -2
math.round(-2.5) --> -3
( -2 > -3)
Read more about various built-in mathematical operations in lua by following this link:
5 Likes
No, you’re thinking of rounding there.
Absolute value is how far a number is from 0. For example, -2 and 2 are both 2 units away from 0, so they both return 2.
5 Likes
Use math.round() to achieve that
math.abs(x) returns back the positive number of x, math.round(x) however returns back an integer of x (Or whole number) when rounding it to the nearest whole number
local Number = -2.48
Number = math.abs(Number)
print(Number)
--2.48
Number = math.round(Number)
print(Number)
--2
1 Like
lua doesn’t support variable pointers last time i checked so your usage of math.abs and math.round is incorrect; this is how you’d actually do it:
local Number = -2.48
Number = math.abs(Number)
print(Number)
-- 2.48
Number = math.round(Number)
print(Number)
-- 2
1 Like
From what people are saying, if you wanna know how it would look like in code, it would be something like this:
function abs(n)
if n < 0 then
return n * -1
end
return n
end
2 Likes
print(math.abs(-1))-- 1
print(math.abs(1))-- 1
math.abs always gives you a positive
heres the tutorial from where i learned it
1 Like
i don’t think math.round is a function
Really? I thought you were able to use math functions without equaling them as values, guess I’ll need to double-check then
All of these are functions used by math, math.round isn’t in the documentation but it is usable isn’t auto-filled in Studio but its function is still usable
2 Likes
It is, it was added back in August.
1 Like
oh, I did not know probably bc there weren’t documented
Ok what last time I checked it wasn’t in there maybe I’m just blind
Oh, maybe I was thinking of when using it in Studio, it wasn’t there to auto-fill it (Fixed it hopefully)
1 Like