Python: Check whether any word in a given sting contains duplicate characrters or not

Last update on June 12 2025 12:43:07 (UTC/GMT +8 hours)

Check words for duplicate characters.

Write a Python program to check whether any word in a given string contains duplicate characters or not. Return True or False.

Sample Solution-1:

Python Code:

# Define a function to check if any word in a string contains duplicate characters
def duplicate_letters(text):
    # Split the input string into a list of words
    word_list = text.split()
    
    # Iterate through each word in the list
    for word in word_list:
        # Check if the length of the word is greater than the number of unique characters in the word
        if len(word) > len(set(word)):
            # If true, the word contains duplicate characters, return False
            return False
    
    # If no word with duplicate characters is found, return True
    return True

# Initialize a string
text = "Filter out the factorials of the said list."

# Print the original text
print("Original text:")
print(text)

# Print a message indicating the check for duplicate characters in any word
print("Check whether any word in the said sting contains duplicate characters or not!")

# Call the function to check for duplicate characters and print the result
print(duplicate_letters(text))

# Repeat the process with different input strings
text = "Python Exercise."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characters or not!")
print(duplicate_letters(text))

text = "The wait is over."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characters or not!")
print(duplicate_letters(text)) 

Sample Output:

Original text:
Filter out the factorials of the said list.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
Python Exercise.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
The wait is over.
Check whether any word in the said sting contains duplicate characrters or not!
True

Flowchart:

Sample Solution-2:

Python Code:

# Define a concise function to check if any word in a string contains duplicate characters
def duplicate_letters(text):
    # Use a generator expression and the 'all()' function to check if all words meet the condition
    return all(len(word) == len(set(word)) for word in text.split())

# Initialize a string
text = "Filter out the factorials of the said list."

# Print the original text
print("Original text:")
print(text)

# Print a message indicating the check for duplicate characters in any word
print("Check whether any word in the said sting contains duplicate characters or not!")

# Call the function to check for duplicate characters and print the result
print(duplicate_letters(text))

# Repeat the process with different input strings
text = "Python Exercise."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characters or not!")
print(duplicate_letters(text))

text = "The wait is over."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characters or not!")
print(duplicate_letters(text)) 

Sample Output:

Original text:
Filter out the factorials of the said list.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
Python Exercise.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
The wait is over.
Check whether any word in the said sting contains duplicate characrters or not!
True

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to check each word in a string for duplicate characters and return True if any word has repeats.
• Write a Python program to split a sentence into words and verify if any word contains any repeated letter.
• Write a Python program to use a loop and set to check for duplicate characters in each word of a given text.
• Write a Python program to implement a function that returns a boolean indicating whether any word in a string has consecutive duplicate characters.

Go to:

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

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