Python: Convert the letters of a given string into alphabetical order

Last update on April 17 2025 13:05:10 (UTC/GMT +8 hours)

Sort String Alphabetically

Write a Python program to convert the letters of a given string (same case-upper/lower) into alphabetical order.

Sample Solution-1:

Python Code:

# Define a function 'test' that sorts the letters of the input string in alphabetical order.
def test(input_str):
    # Using the sorted() function to sort the characters in the input string.
    # The ''.join() method is then used to concatenate the sorted characters into a string.
    return ''.join(sorted(input_str))

# Test the 'test' function with different input strings.
str1 = "PHP"
print("Original string:", str1)
print("Convert the letters of the said string into alphabetical order:", test(str1))

str2 = "javascript"
print("\nOriginal string:", str2)
print("Convert the letters of the said string into alphabetical order:", test(str2))

str3 = "python"
print("\nOriginal string:", str3)
print("Convert the letters of the said string into alphabetical order:", test(str3))

Sample Output:

Original string: PHP
Convert the letters of the said string into alphabetical order: HPP

Original string: javascript
Convert the letters of the said string into alphabetical order: aacijprstv

Original string: python
Convert the letters of the said string into alphabetical order: hnopty

Explanation:

Here is a breakdown of the above Python code:

Test Function (test function):

The "test()" function is defined to sort the characters of the input string alphabetically using the sorted() function.
The sorted characters are then concatenated into a string using the "join()" method.

Flowchart:

Sample Solution-2:

Python Code:

# Define a function 'test' that sorts the letters of the input string in alphabetical order.
def test(input_str):
    # Initialize an empty string 'result' to store the sorted characters.
    result = ""
    
    # Iterate through the sorted characters of the input string.
    for char in sorted(input_str):
        # Concatenate each sorted character to the 'result' string.
        result += char
    
    # Return the final result string with letters in alphabetical order.
    return result

# Test the 'test' function with different input strings.
str1 = "PHP"
print("Original string:", str1)
print("Convert the letters of the said string into alphabetical order:", test(str1))

str2 = "javascript"
print("\nOriginal string:", str2)
print("Convert the letters of the said string into alphabetical order:", test(str2))

str3 = "python"
print("\nOriginal string:", str3)
print("Convert the letters of the said string into alphabetical order:", test(str3))

Sample Output:

Original string: PHP
Convert the letters of the said string into alphabetical order: HPP

Original string: javascript
Convert the letters of the said string into alphabetical order: aacijprstv

Original string: python
Convert the letters of the said string into alphabetical order: hnopty

Explanation:

Here is a breakdown of the above Python code:

Test Function (test function):

The "test()" function is defined to sort the characters of the input string alphabetically using the "sorted()" function.
An empty string 'result' is initialized to store the sorted characters.
o A loop iterates through the sorted characters, and each character is concatenated to the 'result' string.

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to sort the characters of a string in alphabetical order while preserving the original case.
Write a Python program to rearrange a string’s letters alphabetically using the sorted() function.
Write a Python program to convert a string into a sorted string of letters, maintaining the case of each character.
Write a Python program to output an alphabetically ordered version of a string by sorting its characters.

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Python Code Editor:

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