Question

Explain zero factorial.

Answer 1

Factorial of any number $N$:

• The factorial of a number,$N$, is equal to the product of all positive integers less than and equal to $N$
• Symbolically, we write as $N!=Nx(N-1)x(N-2)x\dots x3x2x1$

Zero factorial:

• In mathematics, zero factorial is the expression that means to arrange the data containing no values.
• The factorial of $0$ is equal to $1$
• Symbolically, we write as $0!=1$
• According to the convention of empty product, the result of multiplying no factors is a nullary product. It means that the convention is equal to the multiplicative identity.