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Write your own len() in Python

The method len() returns the number of elements in the list or length of the string depending upon the argument you are passing.

How to implement without using len():

1. Take input and pass the string/list into
   a function which return its length.
2. Initialize a count variable to 0, this count 
   variable count character in the string.
3. Run a loop till length if the string and increment 
   count by 1.
4. When loop is completed return count.

Python implementation:

# Function which return length of string
def findLength(string):
  
    # Initialize count to zero
    count = 0
  
    # Counting character in a string
    for i in string:
        count+= 1
    # Returning count
    return count
  
# Driver code
string = "geeksforgeeks"
print(findLength(string))

Output:

13

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.



This article is attributed to GeeksforGeeks.org

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