Python string length | len()
Python len() function returns the length of the string. In this article, we will see how to find the length or number of items stored in a data structure.
Python len() Syntax
Syntax: len(string)
Return: It returns an integer which is the length of the string.
Python len() Example
The len() method is used to find the length of an object in Python. By using len(), we can find the length of strings and lists. In this example, we are finding the length of a string.
Python3
string = "Geeksforgeeks"print(len(string)) |
13
Example 1: Len() function with tuples and string
In this example, we are counting length of the tuples and list.
Python
# Python program to demonstrate the use of# len() method # with tupletup = (1,2,3)print(len(tup))# with listl = [1,2,3,4]print(len(l)) |
3 4
Example 2: Python len() TypeError
In this example, we are using len() with boolean value and find TypeError as a result.
Python3
print(len(True)) |
Output
TypeError: object of type 'bool' has no len()
Example 3: Python len() with dictionaries and sets
In this example, we are using Python len() with dictionaries and sets to find the length of dictionary and set.
Python3
# Python program to demonstrate the use of# len() method dic = {'a':1, 'b': 2}print(len(dic))s = { 1, 2, 3, 4}print(len(s)) |
2 4
Example 4: Python len() with custom objects
In this example, we are using len() to find the length of custom objects and to find the length of an object in Python.
Python3
class Public: def __init__(self, number): self.number = number def __len__(self): return self.number obj = Public(12)print(len(obj)) |
12
Example 5: Python len() with range()
In this example, we are using len() function to find the length of the range() function.
Python3
l=range(1,10)print(len(l)) |
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