$n! = 1 \cdot 2 \cdot 3 \cdot \ldots \cdot n$ — $n$ ning faktoriali. Masalan, $5! = 120$. Kelishuvga ko‘ra $0! = 1$. $n!$ ni hisoblang.
Kirish ma‘lumotlari
Bitta butun son $n$ ($0 \le n \le 20$).
Chiqish ma‘lumotlari
$n!$ ni chiqaring.
Misollar
Kirish
5
Chiqish
120
Kirish
0
Chiqish
1