# Python built-in math module knowledge points

Source: Internet
Author: User

The Math module implements a number of mathematical functions for floating-point numbers. These functions are generally a simple encapsulation of functions of the same name in the Platform C Library, so the results of calculations under different platforms may be slightly different and sometimes even very large.

 The Python math function must import math Function description Instructions Example Returns the inverse cosine of x Math.acos (x) Returns the inverse hyperbolic cosine of x Math.acosh (x) Return x's Inverse chord Math.asin (x) Returns the inverse hyperbolic sine of x Math.asinh (x) Returns the inverse tangent of X Math.atan (x) Return y/x of the arc tangent Math.atan2 (y,x) Returns the inverse hyperbolic tangent of x Math.atanh (x) Returns the minimum integer of ≧x Math.ceil (x) Math.floor (3.4) Results 4 Returns the X value of the same number as Y Math.copysign (x, y) Returns the cosine of X Math.Cos (x) Returns the hyperbolic cosine of x Math.cosh (x) Turn x (arc length) into angle, and radians as inverse function Math.degrees (x) Constant E = 2.7128 ... Math.e Back to ex, math.e**x. Math.exp (x) Returns the absolute value of X Math.fabs (x) Back to x! Math.factorial (x) Returns the largest integer of ≦x Math.floor (x) Math.floor (3.4) Results 3 Returns the remainder of the X-to-y moduloFmod is similar to%, but the result may be different from%, because the former takes Y to determine the remainder of the symbol, the latter you x to determine the remainder of the symbol. Math.fmod (x, y) Returns a 2-tuple (2-tuple) divided by a false number m (float) andan exponent n (int), that is, x = mx2n and ldexp are inverse functions Math.frexp (x) Math.frexp (1.625) results (0.8125,1) Returns the values of the X array and Math.fsum (x) Math.frexp ([2,5]) Results 7 Return Math.hypot (x, y) If x =±inf is also ±∞Returns True Math.isinf (x) if x = Non (not a number)Returns True Math.isnan (x) Return mx2n and frexp are inverse functions Math.ldexp (M,n) Return, if not write a set E Math.log (X,a) Return MATH.LOG10 (x) Return MATH.LOGLP (x) Returns the number of decimal parts of x and the integral parts MATH.MODF (x) return constant π (3.14159 ...) Math.PI Return to XY Math.pow (x, y) Turn x (angle) into arc length, with degrees as inverse function Math.radians (d) Returns the sine of X Math.sin (x) Returns the hyperbolic sine of x Math.sinh (x) Return MATH.SQRT (x) Returns the tangent of X Math.tan (x) Returns the hyperbolic tangent of X Math.tanh (x) Returns the integral part of x, equal to int Math.trunc (x)

Python built-in math module knowledge points

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