Python-Basic data types

Operator:

1. Arithmetic operations:

2. comparison operation:

3. Assignment Operation:

4. Logic operation:

5. Member Operations:

Basic data type:

1. Number:

int (integral type)

On a 32-bit machine, the number of integers is 32 bits, the range is -2**31 ~ 2**31-1, i.e.-2147483648 ~ 2147483648

On a 64-bit machine, the number of integers is 64 bits and the range is -2**63 ~ 2**63-1, which is -9223372036854775808~9223372036854775807

2. Boolean value:

True or False 1 or 0

3. String:

"Hello World"

string concatenation: The string in Python is embodied in the C language as a character array, each time you create a string, you need to open a contiguous space in memory, and you need to modify the string, you need to open up again, the evil + every occurrence will re-open in memory space

String formatting:

" Alex " Print ("My name is%s")% nameprint ("my nameis" ), name

(String is%s, integer is%d, floating-point number is%f)

String Common functions:

Remove whitespace

Segmentation

Length

Index

Slice

Python-Basic data types