What does len mean in python

What does len mean in python? Let me give you a detailed introduction:

Function: len()

1. Function:

Return the length of string, list, dictionary, tuple, etc.

2. Syntax:

len(str)

3. Parameters:
str: ​​String, list, dictionary, tuple, etc. to be calculated

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4. Return value:

The length of strings, lists, dictionaries, tuples and other elements

5. Example:
5.1. Calculate the length of the string:

>>> s = "hello world php cn"
>>> len(s)
18

5.2. Calculate the number of elements in the list:

>>> l = ['h','e','l','l','o']
>>> len(l)
5

5.3 , Calculate the total length of the dictionary (that is, the total number of key-value pairs):

>>> d = {'num':123,'name':"phpcn"}
>>> len(p)
2

5.4, Calculate the number of tuple elements:

>>> t = ('w','o','r','l','d')
>>> len(t)
5

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