Find the factorial of a number in pl/sql


Given a number, your task to print the factorial of that number using pl/sql.

Examples:

Input : 5
Output : 120

Explanation:
5! = 5 * 4 * 3 * 2 * 1 = 120

Input : 4
Output : 24

Basic structure of pl/sql block

declare
-- declare all the variables

begin  -- for start block
-- make a program here

end -- for end block

The program of factorial of a number in pl/sql is given below:

[sourcecode language=”SQL”]

declare
— it gives the final answer after computation
fac number :=1;

— given number n
— taking input from user
n number := &1;

— start block
begin

— start while loop
while n > 0 loop

— multiple with n and decrease n’s value
fac:=n*fac;
n:=n-1;
end loop;
— end loop

— print result of fac
dbms_output.put_line(fac);

— end the begin block
end;

[/sourcecode]

Output:(if given input as 5)

120


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