In this Python tutorial, you will learn how to find the length of a given list using len() built-in function.
Python List Length
To find the length of a Python List, you can use Python built-in function len().
len() accepts Python List as an argument and returns an integer representing number of elements in the list.
Examples
1. Find length of a List
In the following python program, we initialize a python list with integers and find the length of the list (number of elements in the list).
Python Program
#initialize list
aList = [21, 28, 14, 96, 84, 65, 74, 31]
#find list length
len = len(aList)
#print list length
print('Length of the list is :', len) Try Online Output
Length of the list is : 8
Reference tutorials for the above program
2. Find length of a List with elements of different datatypes
In the following example, we initialize a list with different datatypes and try to find the length of the list using len().
Although the type of the elements does not matter in finding the length of a list, this example must be telling you the same.
Python Program
#initialize list
aList = [True, 28, 'Tiger']
#find list length
len = len(aList)
#print list length
print('Length of the list is :', len) Try Online Output
Length of the list is : 3
3. Find length of an empty List
Of course, the length of an empty list is zero. But we are finding that out programmatically in the following example.
Python Program
#empty list
aList = []
#find list length
len = len(aList)
#print list length
print('Length of the list is :', len) Try Online Output
Length of the list is : 0
Conclusion
In this Python Tutorial, we learned how to find the length of a list using len() function with the help of example Python programs.