Introduction to len() Function in Python 3

The len() function in Python 3 is used to determine the length of an object, such as a string, list, or tuple. Here is the syntax of the len() function:

len(object)

The object parameter can be any object in Python that has a length. The return value of the len() function is an integer value that represents the number of elements in the object.

Examples

String

Let's use the len() function to determine the length of a string:

string = "Python"
length = len(string)
print(length)

Output:

6

The len() function has returned the length of the string which is 6.

List

Now, let's use the len() function with a list:

my_list = [1, 2, 3, 4, 5]
length = len(my_list)
print(length)

Output:

5

The len() function has returned the length of the list which is 5.

Tuple

Finally, let's use the len() function with a tuple:

my_tuple = (1, 2, 3, 4, 5)
length = len(my_tuple)
print(length)

Output:

5

The len() function has returned the length of the tuple which is 5.

Conclusion

In conclusion, the len() function in Python 3 is a useful function to determine the length of an object. It can be used with various objects such as strings, lists, or tuples.