Question

how is 0 factorial = 1​

Answer 1

Answer:

A zero factorial is a mathematical expression for the number of ways to arrange a data set with no values in it, which equals one. ... = 24, for example, is the same as writing 4 x 3 x 2 x 1 = 24, wherein one uses an exclamation mark to the right of the factorial number (four) to express the same equation