Find length of a String in Python: How?

What is Python String Length?

Python's string length function is used to determine a string's length. In Python, a built-in function named len() determines the length of a given string, array, list, tuple, dictionary, etc.

The len() method allows us to enhance the program's performance. Len() assists in providing the number of elements because the number of elements stored in the object is never determined.

Syntax

len(string)

Parameters

String : This will calculate the length of the value passed in the string variable.

Ways to find the length of string in Python

Using the built-in function len()

The len() function is a built-in function in Python used to find the length of a string. This method calculates the number of characters in the string, including spaces. It can also be applied to other data types like lists, tuples, and dictionaries.

For a detailed explanation and to visualize Python code execution step by step, you can check out Python Tutor.

# Python code to demonstrate string length
# using len

str = 'BoardInfinity'
print(len(str))

Output:

write your code here: Coding Playground

Explanation:

In this code, we've used the variable str to store the string "BoardInfinity" before using the len() function, sandwiching str in between. As the word "BoardInfinity" has 13 letters, the output was 13 as a result.

Using for loop to Find the length of the string in python

It is simple and direct to iterate over a string in a for loop. The length of the string may be determined by keeping track of the number of iterations.

# Python code to demonstrate string length
# using for loop

# Returns length of string
def findLength(str):
counter = 0
for i in str:
counter += 1
return counter

str = "BoardInfinity"
print(findLength(str))

Output:

write your code here: Coding Playground

Explanation:

The for loop has been used in this code to determine the length of the text. First, we've taken a str variable and assigned it the string "BoardInfinity" In the second step, we invoked the findLength method with counter set to 0. Following that, a for loop was created from 0 to string, increasing the counter value by 1 at a time. We have written the counter value at long last.

Using while loop and Slicing

With each iteration, we chop a string in half, reducing its length by 1 at regular intervals until the string is empty. The while loop terminates at this point. The length of the string may be determined by keeping track of the number of iterations.

# Python code to demonstrate string length
# using while loop.

# Returns length of string
def findLength(str):
count = 0
while str[count:]:
count = count + 1
return count

str = "BoardInfinity"
print(findLength(str))

Output:

write your code here: Coding Playground

Explanation:

The for loop has been used in this code to determine the length of the text. First, we've created a str variable and assigned the string "LatracalSolutions" to it. Second, we used the findLength method and set the count parameter to be equal to 0. Thirdly, we applied the while loop, where each iteration saw the value of str reduced by one until the string was empty. returned the count value lastly.

Using string methods join and count

An iteration is sent to the join method of strings, which produces a string that combines the iteration's strings. The original string on which the procedure is called serves as the separator between the components. The connected string in the original string will also yield the string's length when using the join and count technique.

# Python code to demonstrate string length
# using join and count

# Returns length of string
def findLength(str):
if not str:
return 0
else:
some_random_str = 'py'
return ((some_random_str).join(str)).count(some_random_str) + 1
str = "BoardInfinity"
print(findLength(str))

Output:

write your code here: Coding Playground

Explanation:

The for loop has been used in this code to determine the length of the text. First, we've created a str variable and assigned the string "BoardInfinity" to it. Second, we invoked the findLength function, applying the if and else clauses. If the string is empty, the if clause specifies that it should return 0, otherwise the else clause will take effect. We have chosen a random string, "py," in which the iteration will join the main text and raise the count value till the string is empty. The output is printed after that.

Using getsizeof() method to Find Length Of String In Python

The storage size of an item that takes up some memory may be determined using this function.

Note: This method is only applicable for normal ascii letters. If you have a special character it’ll not work, as it uses the size of the string in bytes. So be careful while using it!

import sys
s = "BoardInfinity"
print(sys.getsizeof(s) - sys.getsizeof(""))

Output:

write your code here: Coding Playground

Explanation:The built-in Python sys module was utilized in this instance. The length of the string must then be determined by taking a string, s, and using the sys module's getsizeof() function.