PL/SQL Best Practices [14][If Statements]-IFs and Booleans

Avoid IF With Booleans
Sometimes you will code or come across conditional statements which, while valid, are unnecessary and cumbersome. Replace this IF statement:

IF hiredate < SYSDATE
THEN
   date_in_past := TRUE;
ELSE
   date_in_past := FALSE;
END IF;

With this:

date_in_past := 
   hiredate < SYSDATE;

You can assign a Boolean expression directly to a Boolean variable.