Python: Find the lengths of a list of non-empty strings

Last update on May 30 2025 11:48:36 (UTC/GMT +8 hours)

Length of Strings in List

Write a Python program to find the length of a given list of non-empty strings.

Input:
['cat', 'car', 'fear', 'center']
Output:
[3, 3, 4, 6]

Input:
['cat', 'dog', 'shatter', 'donut', 'at', 'todo', '']
Output:
[3, 3, 7, 5, 2, 4, 0]

Visual Presentation:

Sample Solution:

Python Code:

# License: https://bit.ly/3oLErEI

# Define a function named 'test' that takes a list of strings 'strs' as input
def test(strs):
    # Use the map function to apply the len function to each string in 'strs', and convert the result to a list
    return [*map(len, strs)]

# Create a list of strings 'strs' with specific elements
strs = ['cat', 'car', 'fear', 'center']

# Print the original list of strings
print("Original strings:")
print(strs)

# Print a message indicating the operation to be performed on the list
print("Lengths of the said list of non-empty strings:")

# Print the result of the test function applied to the 'strs' list
print(test(strs))

# Create a different list of strings 'strs' with specific elements
strs = ['cat', 'dog', 'shatter', 'donut', 'at', 'todo', '']

# Print the original list of strings
print("\nOriginal strings:")
print(strs)

# Print a message indicating the operation to be performed on the list
print("Lengths of the said list of non-empty strings:")

# Print the result of the test function applied to the modified 'strs' list
print(test(strs))

Sample Output:

Original strings:
['cat', 'car', 'fear', 'center']
Lengths of the said list of non-empty strings:
[3, 3, 4, 6]

Original strings:
['cat', 'dog', 'shatter', 'donut', 'at', 'todo', '']
Lengths of the said list of non-empty strings:
[3, 3, 7, 5, 2, 4, 0]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to calculate and return a list of lengths for each non-empty string in an input list.
• Write a Python program to iterate over a list of strings and output the length of each string using a loop.
• Write a Python program to use list comprehension to generate the lengths of strings from a given list.
• Write a Python program to create a new list containing the character counts of each string from the input list.

Go to:

• Python Puzzles Exercises Home ↩
• Python Exercises Home ↩

Previous: Find the strings in a list, starting with a given prefix.
Next: Find the longest string of a list of strings.

Python Code Editor :

Have another way to solve this solution? Contribute your code (and comments) through Disqus.