Use the Permutation & Combination Calculator to calculate permutations and combinations. Select whether you want to calculate a permutation or a calculation, type in how many objects there are (n), type in how many places there are (k) and watch as Cat uses his silicon brain to find your answer! (Permutation = nPk)
I made this project when I was having trouble calculating permutations and combinations myself - just thought that making this would help reinforce my understanding of permutations and combinations. Bugs that don't want to get squashed: Add to the list by posting in the comments!