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# Logic to find permutations of a string

to print all possible combination of characters in a string

2 Answers

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p (n,r) = n!/(n-r)!
is the formula for finding the no. of permutations

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that was interesting, and I've searched for info. there is a function for this in Python's standard module 'itertools'.
look at my code: http://www.sololearn.com/app/sololearn/playground/ctmEhmAQOsfI/
in future, try finding some info by yourself first, it's a really great skill for a good programmer.