Why Is 0 Factorial One? The Hidden Math Rule That Shapes Modern Science
The first time you encounter it, the rule that why is 0 factorial one feels like a paradox. After all, factorials—those cascading products of integers—are built on multiplication: *n*! = *n* × (*n*–1) × … × 1. Zero, by definition, is the absence of quantity. Yet mathematicians insist 0! = 1, a declaration that seems … Read more
