Question

Select the number(s) for which factorial is defined.

• A. $-2$
• B. $0$
• C. $4$
• D. $\frac{1}{2}$

Answer 1

Answer: (B), (C)

$4$

As we know, factorial is defined for whole numbers only.
In all the given options $0$ and $4$ are only whole numbers. Hence, out of all the given options factorial is defined for $0$ and $4$ only.

$\underset{–}{\text{Note}:}$
Factorial is not defined for negative numbers and fractions.