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Find the factorial of a number in pl/sql
  • Difficulty Level : Medium
  • Last Updated : 06 May, 2018


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:




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;              

Output:(if given input as 5)

120
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