Python: Check whether a string contains all letters of the alphabet

Last update on April 19 2025 13:06:50 (UTC/GMT +8 hours)

Check if string has all alphabet letters.

Write a Python program to check whether a string contains all letters of the alphabet.

Python String Exercises: Check whether a string contains all letters of the alphabet

Sample Solution:

Python Code:

# Import the 'string' module to access the lowercase alphabet.
import string

# Create a set 'alphabet' containing all lowercase letters using 'string.ascii_lowercase'.
alphabet = set(string.ascii_lowercase)

# Define an input string.
input_string = 'The quick brown fox jumps over the lazy dog'

# Check if the set of lowercase characters in the input string contains all the letters of the alphabet.
# Print the result (True or False).
print(set(input_string.lower()) >= alphabet)

# Update the input string.
input_string = 'The quick brown fox jumps over the lazy cat'

# Check if the set of lowercase characters in the updated input string contains all the letters of the alphabet.
# Print the result (True or False).
print(set(input_string.lower()) >= alphabet)

Sample Output:

True                                                                                                          
False

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to determine if a string is a pangram, containing every letter of the English alphabet.
Write a Python program to use set operations to verify that all letters from 'a' to 'z' are present in a given string.
Write a Python program to convert a string to lowercase and check if its set of characters covers the alphabet.
Write a Python program to implement a function that returns True if the input string is a pangram, and False otherwise.

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