Python string length | len() function to find string length
Last Updated :
20 Dec, 2023
The string len() function returns the length of the string. In this article, we will see how to find the length of a string using the string len() method.
Example:
Python3
string = "Geeksforgeeks"
print(len(string))
|
String len() Syntax
len(string)
Parameter
String: string of which you want to find the length.
Return:
It returns an integer which is the length of the string.
What is the String len() Function?
The string len() function is a built-in function in Python that is used to find the length of the string. You can know the number of characters in a string using this function.
It is a very important string function, and it is very easy to use.
How to Use String len() Function?
You can easily use the String len() function, just pass the string as the parameter in the function. Let’s look at an example to understand how to find the length of the string in Python.
More Examples of String len() Function
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.
Example 1: Len() function with tuples and string
In this example, we are counting the length of the tuples and list.
Python
tup = (1,2,3)
print(len(tup))
l = [1,2,3,4]
print(len(l))
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Example 2: Python len() TypeError
In this example, we are using len() with a boolean value and find TypeError as a result.
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
dic = {'a':1, 'b': 2}
print(len(dic))
s = { 1, 2, 3, 4}
print(len(s))
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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))
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Example 5: Python len() with range()
In this example, we are using the len() function to find the length of the range() function.
Python3
l=range(1,10)
print(len(l))
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In this article, we have covered about Python string len() function and discussed its working. len() function is used to find the length of a string. It is a very common yet important function of string methods.
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