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# Factorial

The factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.

n!=n(n-1)(n-2).....3 2 1
1!=1

The above definitions incorporate the instance
0!=1

6!=6·5·4·3·2·1=720

The computer calculates the factorial of the numbers you want:
Write the number (n) =
n!=