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How to sort the letters in a string alphabetically in Python without using join()? Using join() we can do this:

def sort_string(a)
    return ''.join(sorted(a))

Is there a way to sort string without using join()?

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  • You can perform the join manually one letter at a time, but why wouldn't you want to use join? Commented Nov 14, 2015 at 10:24
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    Possible duplicate of How to sort the letters in a string alphabetically in Python Commented Nov 14, 2015 at 10:39
  • @binarysubstrate that gives the answer he starts with. Of course, I agree with interjay: why don't you want to use join? That is a very pythonic way of doing it. Commented Nov 14, 2015 at 13:42
  • I'm voting to close this question as off-topic because use str.join here is the best solution. Commented Nov 15, 2015 at 1:27

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Your solution is correct as strings are immutable in python. So, it's impossible to change (in your case - sort) an existing string. You have to create new one (you do it with join() call).

Also, good notes about sorting letters in string in python can be found here: How to sort the letters in a string alphabetically in Python

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