In this tutorial we will learn about the python len() method and its uses with examples.
What is the python len() Method?
The Python len() method is a built-in Python method that returns the object’s length. It’s also known as the python length method.
The syntax of python len() is:
len(object)
Python len() Parameters Method
The len() method takes only one parameter as an argument.
- object – the name of the object that can be a sequence or a collection.
len() method can be used with almost all the objects like string, integer, tuple, list, range, dictionary, set, list, etc.
Example 1: How to use the len() method in python?
# string
b = “We love Python”
print(“The length of b is:”, len(b))
# list
my_list = [1,2,3,4,5]
print(“The length of my_list is:”, len(my_list))
# tuple
my_tuple = (“Apple”,“Banana”,“Orange”)
print(“The length of my_tuple is:”,len(my_tuple))
Output:
The length of b is: 14
The length of my_list is: 5
The length of my_tuple is: 3
We can also use the len() method and the range() method to check the length of the range.
Example 2: How to use len() with range() method?
# range
print(“The length of range method is”,len(range(1,100)))
Output:
The length of range method is 99
Example 3: How to use the len() method with dictionaries and sets?
# set
my_set = {1,2,3,4,5}
print(“The length of the my_set is”,len(my_set))
# dictionary
my_dict = {1:‘Apple’,2:‘Banana’,3:‘Orange’}
print(“The length of the my_dict is”,len(my_dict))
Output:
The length of the my_set is 5
The length of the my_dict is 3
Rules of len() method
- If a non-sequence object is passed, it will raise a TypeError exception because the len() method cannot deal with non-sequence objects.