Mathematical Functions.
This library is an interface to the standard C math library. It provides all its functions inside the table math.

Type math

math.abs(x)	Returns the absolute value of x.
math.acos(x)	Returns the arc cosine of x (in radians).
math.asin(x)	Returns the arc sine of x (in radians).
math.atan(x)	Returns the arc tangent of x (in radians).
math.atan2(y, x)	Returns the arc tangent of y/x (in radians), but uses the signs of both parameters to find the quadrant of the result.
math.ceil(x)	Returns the smallest integer larger than or equal to x.
math.cos(x)	Returns the cosine of x (assumed to be in radians).
math.cosh(x)	Returns the hyperbolic cosine of x.
math.deg(x)	Returns the angle x (given in radians) in degrees.
math.exp(x)	Returns the value e^x.
math.floor(x)	Returns the largest integer smaller than or equal to x.
math.fmod(x, y)	Returns the remainder of the division of x by y that rounds the quotient towards zero.
math.frexp(x)	Returns m and e such that x = m2^e, e is an integer and the absolute value of m is in the range [0.5, 1) (or zero when x is zero).
math.huge	The value HUGE_VAL, a value larger than or equal to any other numerical value.
math.ldexp(m, e)	Returns m2^e (e should be an integer).
math.log(x)	Returns the natural logarithm of x.
math.log10(x)	Returns the base-10 logarithm of x.
math.max(x)	Returns the maximum value among its arguments.
math.min(x)	Returns the minimum value among its arguments.
math.modf(x)	Returns two numbers, the integral part of x and the fractional part of x.
math.pi	The value of pi.
math.pow(x, y)	Returns x^y.
math.rad(x)	Returns the angle x (given in degrees) in radians.
math.random(m, n)	This function is an interface to the simple pseudo-random generator function rand provided by ANSI C.
math.randomseed(x)	Sets x as the "seed" for the pseudo-random generator: equal seeds produce equal sequences of numbers.
math.sin(x)	Returns the sine of x (assumed to be in radians).
math.sinh(x)	Returns the hyperbolic sine of x.
math.sqrt(x)	Returns the square root of x.
math.tan(x)	Returns the tangent of x (assumed to be in radians).
math.tanh(x)	Returns the hyperbolic tangent of x.

Type math

Field(s)

math.abs(x)

Returns the absolute value of x.

Parameter

• x :

math.acos(x)

Returns the arc cosine of x (in radians).

Parameter

• x :

math.asin(x)

Returns the arc sine of x (in radians).

Parameter

• x :

math.atan(x)

Returns the arc tangent of x (in radians).

Parameter

• x :

math.atan2(y, 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.)

Parameters

• y :
• x :

math.ceil(x)

Returns the smallest integer larger than or equal to x.

Parameter

• x :

math.cos(x)

Returns the cosine of x (assumed to be in radians).

Parameter

• x :

math.cosh(x)

Returns the hyperbolic cosine of x.

Parameter

• x :

math.deg(x)

Returns the angle x (given in radians) in degrees.

Parameter

• x :

math.exp(x)

Returns the value e^x.

Parameter

• x :

math.floor(x)

Returns the largest integer smaller than or equal to x.

Parameter

• x :

math.fmod(x, y)

Returns the remainder of the division of x by y that rounds the quotient towards zero.

Parameters

• x :
• y :

math.frexp(x)

Returns m and e such that x = m2^e, e is an integer and the absolute value of m is in the range [0.5, 1) (or zero when x is zero).

Parameter

• x :

math.huge

The value HUGE_VAL, a value larger than or equal to any other numerical value.

math.ldexp(m, e)

Returns m2^e (e should be an integer).

Parameters

• m :
• e :

math.log(x)

Returns the natural logarithm of x.

Parameter

• x :

math.log10(x)

Returns the base-10 logarithm of x.

Parameter

• x :

math.max(x)

Returns the maximum value among its arguments.

Parameter

• x :

math.min(x)

Returns the minimum value among its arguments.

Parameter

• x :

math.modf(x)

Returns two numbers, the integral part of x and the fractional part of x.

Parameter

• x :

math.pi

The value of pi.

math.pow(x, y)

Returns x^y.
(You can also use the expression x^y to compute this value.)

Parameters

• x :
• y :

math.rad(x)

Returns the angle x (given in degrees) in radians.

Parameter

• x :

math.random(m, n)

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].

Parameters

• m :
• n :

math.randomseed(x)

Sets x as the "seed" for the pseudo-random generator: equal seeds produce equal sequences of numbers.

Parameter

• x :

math.sin(x)

Returns the sine of x (assumed to be in radians).

Parameter

• x :

math.sinh(x)

Returns the hyperbolic sine of x.

Parameter

• x :

math.sqrt(x)

Returns the square root of x.
(You can also use the expression x^0.5 to compute this value.)

Parameter

• x :

math.tan(x)

Returns the tangent of x (assumed to be in radians).

Parameter

• x :

math.tanh(x)

Returns the hyperbolic tangent of x.

Parameter

• x :