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# File Doc/library/math.rst

` `
`    Return the absolute value of *x*.`
` `
`+`
` .. function:: factorial(x)`
` `
`    Return *x* factorial.  Raises :exc:`ValueError` if *x* is not integral or`
`    is negative.`
` `
`+   .. versionadded:: 2.6`
`+`
`+`
` .. function:: floor(x)`
` `
`    Return the floor of *x* as a float, the largest integer value less than or equal`
`    Return the fractional and integer parts of *x*.  Both results carry the sign of`
`    *x*, and both are floats.`
` `
`+`
` .. function:: sum(iterable)`
` `
`    Return an accurate floating point sum of values in the iterable.  Avoids`
`    algorithm's accuracy depends on IEEE-754 arithmetic guarantees and the`
`    typical case where the rounding mode is half-even.`
` `
`+   .. versionadded:: 2.6`
`+`
`+`
` .. function:: trunc(x)`
` `
`    Return the :class:`Real` value *x* truncated to an :class:`Integral` (usually`
` `
`    .. versionadded:: 2.6`
` `
`+`
` Note that :func:`frexp` and :func:`modf` have a different call/return pattern`
` than their C equivalents: they take a single argument and return a pair of`
` values, rather than returning their second return value through an 'output`
` `
` Power and logarithmic functions:`
` `
`-`
` .. function:: exp(x)`
` `
`    Return ``e**x``.`
` `
`    Return the square root of *x*.`
` `
`+`
` Trigonometric functions:`
` `
`-`
` .. function:: acos(x)`
` `
`    Return the arc cosine of *x*, in radians.`
` `
`    Return the tangent of *x* radians.`
` `
`+`
` Angular conversion:`
` `
`-`
` .. function:: degrees(x)`
` `
`    Converts angle *x* from radians to degrees.`
` `
`    Converts angle *x* from degrees to radians.`
` `
`+`
` Hyperbolic functions:`
` `
`-`
` .. function:: acosh(x)`
` `
`    Return the inverse hyperbolic cosine of *x*.`
`    Return the hyperbolic tangent of *x*.`
` `
` `
`-`
` The module also defines two mathematical constants:`
` `
`-`
` .. data:: pi`
` `
`    The mathematical constant *pi*.`