创建一个程序来找出数字的阶乘？

mysql> Delimiter // mysql> CREATE PROCEDURE fact(IN x INT) -> BEGIN -> DECLARE result INT; -> DECLARE i INT; -> SET result = 1; -> SET i = 1; -> WHILE i <= x DO -> SET result = result * i; -> SET i = i + 1; -> END WHILE; -> SELECT x AS Number, result as Factorial; -> END// Query OK, 0 rows affected (0.17 sec)

现在，当通过传递我们想要获取阶乘作为参数的值来调用此过程时 -

mysql> Delimiter ;
mysql> CALL Fact(5);
+--------+-----------+
| Number | Factorial |
+--------+-----------+
|      5 |       120 |
+--------+-----------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql> CALL Fact(6);
+--------+-----------+
| Number | Factorial |
+--------+-----------+
|      6 |       720 |
+--------+-----------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

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