Python: Calculate the length of a string

Last update on April 19 2025 13:05:41 (UTC/GMT +8 hours)

Calculate string length.

Write a Python program to calculate the length of a string.

Sample Solution:

Python Code:

# Define a function named string_length that takes one argument, str1.
def string_length(str1):
    # Initialize a variable called count to 0 to keep track of the string's length.
    count = 0

    # Iterate through each character in the input string str1.
    for char in str1:
        # For each character encountered, increment the count by 1.
        count += 1

    # Return the final count, which represents the length of the input string.
    return count

# Call the string_length function with the argument 'w3resource.com' and print the result.
print(string_length('w3resource.com')) 

Sample Output:

14

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to calculate the length of a string recursively without using the built-in len() function.
• Write a Python program to determine the length of a string by converting it to a list and summing 1 for each element.
• Write a Python program to compute the length of a string using a for-loop that increments a counter for each character.
• Write a Python program to use list comprehension and the sum() function to calculate the total number of characters in a string.

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• Python Data Type String Exercises Home ↩
• Python Exercises Home ↩

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