Check Number is Armstrong in PL/SQL Programming

It is a sample pl/sql program to take input a number from user and it checks accepted number is Armstrong or not.

Aim - PL/SQL program to check whether number is Armstrong or not.

Program:-

declare
  pnum number(5);
  tot number(5);
  lp number(3);
  tmp number(5);
begin
  pnum:=&pnum;
  tmp:=pnum;
  tot:=0;
  while tmp>0
  loop
    lp:=tmp mod 10;
    tot:= tot + (lp*lp*lp);
    tmp:=floor(tmp/10);
  end loop;
  if(tot like pnum) then
    dbms_output.put_line(pnum||' is armstrong.');
  else
    dbms_output.put_line(pnum||' is not armstrong.');
  end if;
end;

Output: -
Enter value for pnum: 153
old 7: pnum:=&pnum;
new 7: pnum:=153;
153 is armstrong.