Chapter 3 python3, python3

Chapter 3 python3, python3

Mathematical functions

Function	Return Value (description)
Abs (x)	Returns the absolute value of a number. For example, abs (-10) returns 10.
Ceil (x)	Returns the upper integer of a number. For example, math. ceil (4.1) returns 5.
Cmp (x, y)	If x <y returns-1, if x = y returns 0, if x> y returns 1.Python 3 is obsolete. UseUse (x> y)-(x <y)Replace.
Exp (x)	Returns the x power of e (ex). For example, math. exp (1) returns 2.718281828459045
Fabs (x)	Returns the absolute value of a number. For example, math. fabs (-10) returns 10.0
Floor (x)	Returns the rounded down integer of a number. For example, math. floor (4.9) returns 4.
Log (x)	For example, math. log (math. e) returns 1.0, math. log (2.0) returns
Log10 (x)	Returns the logarithm of x on the base of 10. For example, math. log10 (100) returns 2.0.
Max (x1, x2 ,...)	Returns the maximum value of a given parameter, which can be a sequence.
Min (x1, x2 ,...)	Returns the minimum value of a given parameter, which can be a sequence.
Modf (x)	Returns the integer and decimal parts of x. The numerical symbols of the two parts are the same as those of x, and the integer part is expressed as a floating point.
Pow (x, y)	The value after the x ** y operation.
Round (x [, n])	Returns the rounding value of floating point x. If n is given, it indicates the number of digits rounded to the decimal point.
Sqrt (x)	Returns the square root of x.

 

 

 
Random Number Function
Random numbers can be used in mathematics, games, security, and other fields. They are often embedded in algorithms to improve algorithm efficiency and program security.

Function	Description
Choice (seq)	Randomly select an element from the element of the sequence, such as random. choice (range (10), and randomly select an integer from 0 to 9.
Randrange ([start,] stop [, step])	Obtains a random number from a set that increments by the specified base number within the specified range. The default value of the base number is 1.
Random ()	The next real number is randomly generated within the range of [0, 1.
Seed ([x])	Change the seed of the random number generator. If you do not understand the principle, you do not need to set seed. Python will help you select seed.
Shuffle (lst)	Random sorting of all elements in a sequence
Uniform (x, y)	The next real number is randomly generated, which is within the range of [x, y.

 

Trigonometric function

Function	Description
Acos (x)	Returns the arc cosine radians of x.
Asin (x)	Returns the arc sine radians of x.
Atan (x)	Returns the arc tangent radians of x.
Atan2 (y, x)	Returns the arc tangent of the given X and Y coordinate values.
Cos (x)	Returns the cosine of the radians of x.
Hypot (x, y)	Returns the euclidean norm sqrt (x * x + y * y ).
Sin (x)	Returns the sine of x radians.
Tan (x)	Returns the tangent of x radians.
Degrees (x)	Converts radians to degrees. For example, if degrees (math. pi/2), 90.0 is returned.
Radians (x)	Converts degrees to radians.

 

 

Mathematical constants

Constant	Description
Pi	Mathematical constant pi (circumference rate, usually expressed by π)
E	Mathematical constants e, e are natural constants (natural constants ).