Write PL/SQL program to calculate factorial of a given number.

SQL> DECLARE

  2     FACT NUMBER:= 1;

  3     I NUMBER:=&I;

  4  BEGIN

  5     WHILE(I>0) LOOP

  6             FACT:= FACT*I;

  7             I:=I-1;

  8     END LOOP;

  9     DBMS_OUTPUT.PUT_LINE(FACT);

 10  END;

 11  /

Enter value for i: 5

120

PL/SQL procedure successfully completed.