:mod:`math` -- mathematical functions ===================================== .. module:: math :synopsis: mathematical functions The ``math`` module provides some basic mathematical funtions for working with floating-point numbers. *Note:* On the pyboard, floating-point numbers have 32-bit precision. Functions --------- .. function:: acos(x) Return the inverse cosine of ``x``. .. function:: acosh(x) Return the inverse hyperbolic cosine of ``x``. .. function:: asin(x) Return the inverse sine of ``x``. .. function:: asinh(x) Return the inverse hyperbolic sine of ``x``. .. function:: atan(x) Return the inverse tangent of ``x``. .. function:: atan2(y, x) Return the principal value of the inverse tangent of ``y/x``. .. function:: atanh(x) Return the inverse hyperbolic tangent of ``x``. .. function:: ceil(x) Return an integer, being ``x`` rounded towards positive infinity. .. function:: copysign(x, y) Return ``x`` with the sign of ``y``. .. function:: cos(x) Return the cosine of ``x``. .. function:: cosh(x) Return the hyperbolic cosine of ``x``. .. function:: degrees(x) Return radians ``x`` converted to degrees. .. function:: erf(x) Return the error function of ``x``. .. function:: erfc(x) Return the complementary error function of ``x``. .. function:: exp(x) Return the exponential of ``x``. .. function:: expm1(x) Return ``exp(x) - 1``. .. function:: fabs(x) Return the absolute value of ``x``. .. function:: floor(x) Return an integer, being ``x`` rounded towards negative infinity. .. function:: fmod(x, y) Return the remainder of ``x/y``. .. function:: frexp(x) Decomposes a floating-point number into its mantissa and exponent. The returned value is the tuple ``(m, e)`` such that ``x == m * 2**e`` exactly. If ``x == 0`` then the function returns ``(0.0, 0)``, otherwise the relation ``0.5 <= abs(m) < 1`` holds. .. function:: gamma(x) Return the gamma function of ``x``. .. function:: isfinite(x) Return ``True`` if ``x`` is finite. .. function:: isinf(x) Return ``True`` if ``x`` is infinite. .. function:: isnan(x) Return ``True`` if ``x`` is not-a-number .. function:: ldexp(x, exp) Return ``x * (2**exp)``. .. function:: lgamma(x) Return the natural logarithm of the gamma function of ``x``. .. function:: log(x) Return the natural logarithm of ``x``. .. function:: log10(x) Return the base-10 logarithm of ``x``. .. function:: log2(x) Return the base-2 logarithm of ``x``. .. function:: modf(x) Return a tuple of two floats, being the fractional and integral parts of ``x``. Both return values have the same sign as ``x``. .. function:: pow(x, y) Returns ``x`` to the power of ``y``. .. function:: radians(x) Return degrees ``x`` converted to radians. .. function:: sin(x) Return the sine of ``x``. .. function:: sinh(x) Return the hyperbolic sine of ``x``. .. function:: sqrt(x) Return the square root of ``x``. .. function:: tan(x) Return the tangent of ``x``. .. function:: tanh(x) Return the hyperbolic tangent of ``x``. .. function:: trunc(x) Return an integer, being ``x`` rounded towards 0. Constants --------- .. data:: e base of the natural logarithm .. data:: pi the ratio of a circle's circumference to its diameter