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# Python len(x)

`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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This method returns the length (the number of items) of an object

What do you mean by length of an object?

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@ghost ghost May 25, 2016 •
edited by ghost
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built in function built-in function

argument x. argument, x.


## Arguments

It takes one argument `x` - 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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argument x argument, x

argument may This argument may


## Return Value

This function returns the number of elements in the list
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This function returns the number of elements in the list

But you just mentioned sequence and collection

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list list.

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@alayek
Object refers to anything which is passed as an argument. It can be a sequence or a collection.
Please refer: http://www.diveintopython.net/getting_to_know_python/everything_is_an_object.html

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Yes, in Python, everything is an object. It's too broad. For instance, what would be len(4)? 4 is an int object.

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Its according to the official documentation and that is why I have mentioned that "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)"


## Code Sample

```python
list1 = [123, 'xyz', 'zara']
str1 = 'basketball'
print(len(list1)) # prints 3
print(len(str1)) # prints 10
```

:rocket: [Run Code](https://repl.it/CUmt)
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Add more example with tuple and dictionaries. Also add comments as to why which value would be printed.


[Official Docs](https://docs.python.org/3/library/functions.html#len)