These are the functions in the "math" table.
Trigonometry functions use radians. To convert degrees to radians use math.rad.
Or, to look at it another way:
radians = degrees * math.pi / 180
math.abs (v)
Absolute value of v.
math.abs (-5) --> 5
math.acos (v)
Arc cosine of v. (Inverse operation of math.cos (v)).
math.deg (math.acos (0.5)) --> 60
math.asin (v)
Arc sine of v. (Inverse operation of math.sin(v)).
math.atan (v)
Arc tangent of v. (Inverse operation of math.tan (v)).
math.atan2 (v1, v2)
Arc tangent of v1/v2.
math.ceil (v)
Smallest integer >= v
math.ceil (5.5) --> 6
math.cos (v)
Cosine of v radians.
math.cos (math.rad (60)) --> 0.5
math.cosh (v)
Hyperbolic cosine of v radians.
math.cosh (math.rad (60)) --> 1.6002868577024
math.deg (v)
Convert v from radians to degrees. Note that math.rad is the inverse operation.
math.deg (1.0471975511966) --> 60
math.exp (v)
e to the power v. Note that math.log is the inverse operation.
math.exp (1) --> 2.718281828459 (e itself in this case)
math.floor ()
Largest integer <= v
math.floor (5.5) --> 5
math.fmod (v1, v2)
The modulus (remainder) of doing: v1 / v2
math.fmod (100, 22) --> 12
m, n = math.frexp (v)
The frexp function breaks down the floating-point value (v) into a mantissa (m) and an exponent (n), such that the absolute value of m is greater than or equal to 0.5 and less than 1.0, and v = m * 2^n.
Note that math.ldexp is the inverse operation.
m, n = math.frexp (1.23456e24)
print (m) --> 0.51060204851673
print (n) --> 81
print ( 0.51060204851673 * 2^81 ) --> 1.23456e+024
math.huge
The value HUGE_VAL, a value larger than or equal to any other numerical value. Note that this is a number, not a function.
math.huge --> 1.#INF
math.ldexp (m, n)
The ldexp function returns the value of m * 2^b.
Note that math.frexp is the inverse operation.
math.ldexp (0.51060204851673, 81) --> 1.23456e+024
math.ldexp (math.frexp (23452345) ) --> 23452345
math.log (v)
Natural log of v. Note that math.exp is the inverse operation.
math.log (123456) --> 11.723640096265
math.exp (math.log (123456)) --> 123456
math.log10 (v)
Log to the base 10 of v.
math.log10 (123456) --> 5.0915122016278
10 ^ 5.0915122016278 --> 123456.00000001 (slight rounding error)
math.max (v1, v2, ...)
The highest of one or more numbers.
math.max (4, 8, 100) --> 100
math.min ()
The lowest of one or more numbers.
math.min (4, 8, 100) --> 4
i, f = math.modf (v)
Returns two numbers, the integral part of v and the fractional part of v
math.modf (10.2) --> 10 0.2
math.pi
A variable representing the value of pi (not a function).
print (math.pi) --> 3.1415926535898
math.pow (v1, v2)
v1 raised to the power v2.
math.pow (2, 8) --> 256
math.rad (v)
Convert v from degrees to radians. Note that math.deg is the inverse operation.
math.rad (60) --> 1.0471975511966
assert (math.pi / 180 == math.rad (1)) --> (they are the same)
math.random (n, u)
With no arguments, returns a random number in the range [0, 1). That is, zero up to but excluding 1.
With 1 argument, returns an integer in the range [1, n]. That is from 1 up to and including n.
With 2 arguments, returns an integer in the range [n, u]. That is from n up to and including u.
Use math.randomseed to seed the generator.
math.random () --> 0.30195013275552 (for example)
math.random (5) --> (a number from 1 to 5)
math.random (4, 8) --> (a number from 4 to 8)
math.randomseed ()
Seeds the random number generator with an integer. Re-seed with the same number to regenerate the same sequences by calling math.random.
math.randomseed (44)
math.sin (v)
Sine of v radians.
math.sin ( math.rad (30)) --> 0.5
math.sinh (v)
Hyperbolic sine of v radians.
math.sinh ( math.rad (30)) --> 0.54785347388804
math.sqrt ()
Square root of v.
math.sqrt (16) --> 4
math.tan (v)
Tangent of v radians.
math.tan( math.rad (45)) --> 1
math.tanh (v)
Hyperbolic tangent of v radians.
math.tanh( math.rad (45)) --> 0.65579420263267
See Also ...
Topics
Lua base functions
Lua coroutine functions
Lua debug functions
Lua io functions
Lua os functions
Lua package functions
Lua script extensions
Lua string functions
Lua table functions(Help topic: general=lua_math)
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