Documentation for the Lua math standard library. From Lua 5.1 Reference Manual by Roberto Ierusalimschy, Luiz Henrique de Figueiredo, Waldemar Celes. Copyright © 2006-2012 Lua.org, PUC-Rio. Freely available under the terms of the Lua license.
Returns the absolute value of x.
x -
Returns the arc cosine of x (in radians).
x -
Returns the arc sine of x (in radians).
x -
Returns the arc tangent of x (in radians).
x -
Returns the arc tangent of y/x
(in radians),
but uses the signs of both parameters to find the
quadrant of the result.
(It also handles correctly the case of x being zero.)
y -
x -
Returns the smallest integer larger than or equal to x.
x -
Returns the cosine of x (assumed to be in radians).
x -
Returns the hyperbolic cosine of x.
x -
Returns the angle x (given in radians) in degrees.
x -
Returns the value ex.
x -
Returns the largest integer smaller than or equal to x.
x -
Returns the remainder of the division of x by y that rounds the quotient towards zero.
x -
y -
Returns m and e such that x = m2e, e is an integer and the absolute value of m is in the range [0.5, 1) (or zero when x is zero).
x -
The value HUGE_VAL, a value larger than or equal to any other numerical value.
Returns m2e (e should be an integer).
m -
e -
Returns the natural logarithm of x.
x -
Returns the base-10 logarithm of x.
x -
Returns the maximum value among its arguments.
x -
... -
Returns the minimum value among its arguments.
x -
... -
Returns two numbers, the integral part of x and the fractional part of x.
x -
The value of PI.
Returns xy.
(You can also use the expression x^y
to compute this value.)
x -
y -
Returns the angle x (given in degrees) in radians.
x -
This function is an interface to the simple pseudo-random generator function rand provided by ANSI C. (No guarantees can be given for its statistical properties.) When called without arguments, returns a uniform pseudo-random real number in the range [0,1). When called with an integer number m, math.random returns a uniform pseudo-random integer in the range [1, m]. When called with two integer numbers m and n, math.random returns a uniform pseudo-random integer in the range [m, n].
[m] -
[n] -
Sets x as the "seed" for the pseudo-random generator: equal seeds produce equal sequences of numbers.
x -
Returns the sine of x (assumed to be in radians).
x -
Returns the hyperbolic sine of x.
x -
Returns the square root of x.
(You can also use the expression x^0.5
to compute this value.)
x -
Returns the tangent of x (assumed to be in radians).
x -
Returns the hyperbolic tangent of x.
x -