44 lines
1.5 KiB
Markdown
44 lines
1.5 KiB
Markdown
---
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title: Python Len Function
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---
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`len()` is a built-in function in Python 3\. This method returns the length (the number of items) of an object. It takes one argument `x`.
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## Arguments
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It takes one argument, `x`. This argument may be a sequence (such as a string, bytes, tuple, list, or range) or a collection (such as a dictionary, set, or frozen set).
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## Return Value
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This function returns the number of elements in the argument which is passed to the `len()` function.
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## Code Sample
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```py
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>>> list1 = [123, 'xyz', 'zara'] # list
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>>> print(len(list1)) # prints 3 as there are 3 elements in the list1
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3
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```
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```py
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>>> str1 = 'basketball' # string
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>>> print(len(str1)) # prints 10 as the str1 is made of 10 characters
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10
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```
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```py
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>>> tuple1 = (2, 3, 4, 5) # tuple
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>>> print(len(tuple1)) # prints 4 as there are 4 elements in the tuple1
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4
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```
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```py
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>>> dict1 = {'name': 'John', 'age': 4, 'score': 45} # dictionary
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>>> print(len(dict1)) # prints 3 as there are 3 key and value pairs in the dict1
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3
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```
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```py
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>>> d2=[[1,2,3],[3,4,5],[5,6,7,2]] # 2 dimensional list or a list of lists
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>>> print(len(d2)) #prints 3 because there are 3 different lists in the outer list.
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3
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```
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 <a href='https://repl.it/CUmt/15' target='_blank' rel='nofollow'>Run Code</a>
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<a href='https://docs.python.org/3/library/functions.html#len' target='_blank' rel='nofollow'>Official Docs</a>
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