factorial
noun /fækˈtɔːriəl/
/fækˈtɔːriəl/
(mathematics- the result when you multiply a whole number by all the numbers below it
阶乘 - 5! (= factorial 5) is 120 (= 5 × 4 × 3 × 2 × 1).
5!(5 的阶乘)为 120(即 5 × 4 × 3 × 2 × 1)。
- 5! (= factorial 5) is 120 (= 5 × 4 × 3 × 2 × 1).