# C Program to calculate Permutation and Combination

The following is a C program to compute  Permutation and Combination:

Expected Output:

1st run:

2nd run:

## How it works

Nothing magical here we are simply using the formula to calculate permutation and combination.

The permutations of n different objects taken r at a time is given by:

$nPr = \frac{n!}{(n-r)!}$

The combinations of n different objects taken r at a time is given by:

$nCr = \frac{n!}{r!(n-r)!}$