17. math module
The math module provides some basic mathematical functions for working with floating-point numbers.
17.1. Functions
- math.acos(x)
Return the inverse cosine of
x.
- math.asin(x)
Return the inverse sine of
x.
- math.atan(x)
Return the inverse tangent of
x.
- math.atan2(y, x)
Return the principal value of the inverse tangent of
y/x.
- math.ceil(x)
Return an integer, being
xrounded towards positive infinity.
- math.copysign(x, y)
Return
xwith the sign ofy.
- math.cos(x)
Return the cosine of
x.
- math.degrees(x)
Return radians
xconverted to degrees.
- math.exp(x)
Return the exponential of
x.
- math.fabs(x)
Return the absolute value of
x.
- math.floor(x)
Return an integer, being
xrounded towards negative infinity.
- math.fmod(x, y)
Return the remainder of
x/y.
- math.frexp(x)
Decomposes a floating-point number into its mantissa and exponent. The returned value is the tuple
(m, e)such thatx == m * 2**eexactly. Ifx == 0then the function returns(0.0, 0), otherwise the relation0.5 <= abs(m) < 1holds.
- math.isfinite(x)
Return
Trueifxis finite.
- math.isinf(x)
Return
Trueifxis infinite.
- math.isnan(x)
Return
Trueifxis not-a-number
- math.ldexp(x, exp)
Return
x * (2**exp).
- math.log(x)
- math.log(x, base)
- With one argument, return the natural logarithm of x.With two arguments, return the logarithm of x to the given base.
- math.modf(x)
Return a tuple of two floats, being the fractional and integral parts of
x. Both return values have the same sign asx.
- math.pow(x, y)
Returns
xto the power ofy.
- math.radians(x)
Return degrees
xconverted to radians.
- math.sin(x)
Return the sine of
x.
- math.sqrt(x)
Return the square root of
x.
- math.tan(x)
Return the tangent of
x.
- math.trunc(x)
Return an integer, being
xrounded towards 0.
17.2. Constants
- math.e
base of the natural logarithm
- math.pi
the ratio of a circle’s circumference to its diameter