Python Program to Calculate the Length of a String Without using Library Functions

This is a Python Program to calculate the length of a string without using library functions.

Problem Description

The program takes a string and calculates the length of the string without using library functions.

Problem Solution

1. Take a string from the user and store it in a variable.
2. Initialize a count variable to 0.
3. Use a for loop to traverse through the characters in the string and increment the count variable each time.
4. Print the total count of the variable.
5. Exit.

Program/Source Code

Here is source code of the Python Program to calculate the length of a string without using library functions. The program output is also shown below.

string=raw_input("Enter string:")
count=0
for i in string:
      count=count+1
print("Length of the string is:")
print(count)
Program Explanation

1. User must enter a string and store it in a variable.
2. The count variable is initialized to zero.
3. The for loop is used to traverse through the characters in the string.
4. The count is incremented each time a character is encountered.
5. The total count of characters in the string which is the length of the string is printed.

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Runtime Test Cases
 
Case 1:
Enter string:Hello
Length of the string is:
5
 
Case 2:
Enter string:Bangalore
Length of the string is:
9

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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