n factorial is product of all numbers between n and 1.
0 factorial is (0 * 1 = 0).
Why is 0 factorial 1?
How can I proof this in mathematical way?
2026-04-04 13:38:37.1775309917
Why is 0 factorial 1?
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It is just for definition of ! function 0=1! And n!=(n-1)!n