letters can be arranged in different orders...
1 letter can b arranged one way round
e.g. = A
2 letters can be arranged two ways round.
e.g. = AB, BA
3 letters can be arranged six ways around.
e.g. = ABC, ACB, BCA, BAC, CBA, CAB
4 letters can be arranged twenty four ways around.
e.g. = i cant be bothered
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so.. (the the numbers in bold being the amount of letters in the words...)
1=1
2=2x1
3=3x2x1
4=4x3x2x1
5=5x4x3x2x1
6=6x5x4x3x2x1
etc etc...
1=1
2=2
3=6
4=24
5=120
6=720
and so on...
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i understand how it works...
but what i dont undertsand is how i could have this as a formula so i could say
combinations of letter arrangement = .................. (formula)
can anyone shed some light on the subject?
thanks