Python3 data type for storing digital values.
It is not allowed to change the data type, which means that, if you change the value of the digital data type, will be re-allocated memory space.
Python supports three different values of different types:
Integer (int): usually referred to as an integer or an integer, is positive or negative integer, with no decimal. python3 is no limit to the size of the integer. Long can be used as the type of use
Float (float): float fractional part is composed of an integer part, it may be a floating-point represented by the scientific notation.
Complex (complex): the complex is composed of a real number part and imaginary number part, they can be a float.
Python numeric type conversion
Sometimes we need to built-in data type conversion, data type conversion, just need to type the data as a function name.
int (x): to convert into an integer x
flaot (x): converts into a floating point number x
complex (x): x converted into a complex number, x is the real part, imaginary part is 0
complex (x, y): x and y are converted into a complex number, x is the real part, imaginary part to y.
Python number crunching:
It may be used as +, -, *, / digital computing expressions used.
Digital function
| function |
description |
| abs(x) |
Returns the absolute value of digital |
| ceil(x) |
Returns the integer into the |
| exp(x) |
Returns e raised to the power x |
| fabs(x) |
Returns the absolute value of a float |
| floor(x) |
Returns the integer rounded floor (4.9) = 4 |
| log(x) |
Returns the logarithm to the base e |
| log10(x) |
Returns the logarithm to the base 10 |
| max(x1,x2…) |
Is returned to the maximum value given parameter |
| (x1, x2, ...) |
Is returned to the minimum value of the given parameter |
| modf(x) |
Returns the integer part and a fractional part of x, sign of the value of the two parts of the same, in floating-point integer part |
| pow (x, y) |
Value computing x ** y |
| round(x,[,n]) |
Returns the four-color into the floating-point number five |
| sqrt(x) |
Returns the square root of x |
Random number function:
Random number can be used for numbers, gaming and security fields, often nested into the algorithm to improve the efficiency and improve the safety of the procedure.
Python comprising conventional random function
| function |
description |
| choice(seq) |
A randomly selected element from the sequence. random.choice (range (10)), a randomly selected integer from 0-9 |
| randrange(start,stop,step) |
Acquiring a random number by the specified base set of increments within a predetermined range from the default value of 1 base |
| random() |
Generate a random real number (0, 1) in the range of |
| seed(x) |
Changing the random number generation number seed. |
| shuffle(lst) |
All elements of a sequence of random ordering |
| uniform(x,y) |
Next generates a random real number, it is [x, y] in |
Trigonometric functions:
| function |
description |
| acos(x) |
Returns the inverse cosine of x radians |
| asin(x) |
Returns the arc sine of x radians |
| atan (x) |
Returns the arctangent of x radians |
| atan2 (y, x) |
Returns the given values of x and y coordinates of the arctangent |
| cos(x) |
Returns the cosine of x radians |
| 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) |
The loaded into the angle in radians |
| radians(x) |
Converts degrees to radians |
Mathematical Constants
| constant |
description |
| pi |
PI |
| e |
Constants of nature |