Drawing a blank on how to get a string and use factorials to re-arrange the letters in all the possible combos. Don't think of letters, think of indexes. Now, with a group of sequential numbers, how ...

Hi everyone,<BR><BR>Let's say I have 4 numbers: 1234.<BR><BR>I wish to find out all possible permutations of this 4 numbers. I believe there is a total of 12 permutations.<BR><BR>I couldnt figure out ...