> CREATE OR REPLACE FUNCTION FACTORIAL_1(factstr varchar2
)
2 RETURN NUMBER AS
3 new_str VARCHAR2(4000) := factstr||'*' ;
4 fact number := 1 ;
5 BEGIN
6
7 WHILE new_str IS NOT NULL
8 LOOP
9 fact := fact *
TO_NUMBER(SUBSTR(new_str,1,INSTR(new_str,'*')-1));
10 new_str := substr(
new_str,INSTR(new_str,'*')+1);
11 END LOOP;
12
13 RETURN fact;
14
15 END;
explanation Above program?
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