If the input provided is “546”, then your solution should return "654,645,564,546,465,456" as these are all the combination that can be made with integers
I am not 100% sure what algorithm to use to achieve the most efficient answer
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Cross-site dupe https://codereview.stackexchange.com/q/7001 - just make your number a string and split it into characters first. – Jack Bashford Jul 20 '19 at 14:46
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This is normally called "generating all permutations", not sorting, which is the word used for generating a *specific* permutation according to an ordering rule – harold Jul 20 '19 at 14:48