Combinatorics Memes

Mathematicians and programmers shaking hands over the beautiful agreement that 0! equals 1. For the uninitiated, factorial of 0 is defined as 1 in mathematics (because of the empty product convention), and programmers just nod along because it makes our recursive functions work without exploding. It's one of those rare moments where math people and code monkeys are on the same page—no Stack Overflow thread needed, no heated debates, just pure harmony. Both sides benefit: mathematicians keep their combinatorics clean, and we avoid writing ugly edge cases in our factorial functions. Win-win.