To find the length of a set in Python, the easiest way is to use the Python **len()** function. The **len()** function returns the number of elements in the set and the size of the set.

`length_of_set = len(set)`

In Python, sets are a collection of elements which is unordered and mutable. When working with sets, it can be useful to be able to easily calculate the set length and size of a set.

To get the length of a set in Python, we can use the Python **len()** function.

Let’s say we have the following setin our Python code.

```
set_variable = set()
set_variable.add("These")
set_variable.add("are")
set_variable.add("set")
set_variable.add("items")
```

To get the size of our set variable, we can call the **len()** function.

```
set_variable = set()
set_variable.add("These")
set_variable.add("are")
set_variable.add("set")
set_variable.add("items")
length_of_set = len(set_variable)
print(length_of_set)
#Output:
4
```

As you can see above, there are 4 elements, and as a result, the **len()** function returns 4.

## Using the Python len() Function to Find the Length of Other Objects in Python

The Python **len()** function is one of the most used functions in the Python programming language.

You can also use the **len()** function to find the length of a string, the length of a list, and the length of a dictionary, the length of a tuple in Python.

For example, if I wanted to find the length of the following string variable, I’d just pass it to the **len()** function.

```
print(len("This is a string variable."))
#Output:
26
```

Hopefully this article has been useful for you to learn how to use the Python **len()** function to find the length of a set.

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