micropython/docs/Development_manual_document_section/03-Basic_Module/04-math.md

math – 数学函数

!!! abstract "简介"

**math** 模块提供了对 C 标准定义的数学函数的访问。  
本模块需要带有硬件FPU，精度是32位，这个模块需要浮点功能支持。

函数

math.acos(x)

返回 x 的反余弦。

math.acosh(x)

返回 x 的逆双曲余弦。

math.asin(x)

返回 x 的反正弦。

math.asinh(x)

返回x 的逆双曲正弦。

math.atan(x)

返回 x 的逆切线。

math.atan2(y, x)

Return the principal value of the inverse tangent of y/x.

math.atanh(x)

Return the inverse hyperbolic tangent of x.

math.ceil(x)

Return an integer, being x rounded towards positive infinity.

math.copysign(x, y)

Return x with the sign of y.

math.cos(x)

Return the cosine of x.

math.cosh(x)

Return the hyperbolic cosine of x.

math.degrees(x)

Return radians x converted to degrees.

math.erf(x)

Return the error function of x.

math.erfc(x)

Return the complementary error function of x.

math.exp(x)

Return the exponential of x.

math.expm1(x)

Return exp(x) - 1.

math.fabs(x)

Return the absolute value of x.

math.floor(x)

Return an integer, being x rounded 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 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.

math.gamma(x)

Return the gamma function of x.

math.isfinite(x)

Return True if x is finite.

math.isinf(x)

Return True if x is infinite.

math.isnan(x)

Return True if x is not-a-number

math.ldexp(x, exp)

Return x * (2**exp).

math.lgamma(x)

Return the natural logarithm of the gamma function of x.

math.log(x)

Return the natural logarithm of x.

math.log10(x)

Return the base-10 logarithm of x.

math.log2(x)

Return the base-2 logarithm of x.

math.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.

math.pow(x, y)

Returns x to the power of y.

math.radians(x)

Return degrees x converted to radians.

math.sin(x)

Return the sine of x.

math.sinh(x)

Return the hyperbolic sine of x.

math.sqrt(x)

Return the square root of x.

math.tan(x)

Return the tangent of x.

math.tanh(x)

Return the hyperbolic tangent of x.

math.trunc(x)

返回一个整数, x 接近于0。

常数

math.e

自然对数的底

math.pi

圆周率

更多内容可参考 math 。

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