mathjs/docs/reference/functions/permutations.md

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# Function permutations
Compute the number of permutations of n items taken k at a time
permutations(n) permutations(n, k)
permutations only takes integer arguments the following condition must be enforced: k <= n
### Parameters
Parameter | Type | Description
--------- | ---- | -----------
### Returns
Type | Description
---- | -----------
Number &#124; BigNumber | permutations
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