ELSIF PLSQL

ELSIF 

IF condition1 THEN
   {...statements to execute when condition1 is TRUE...}

ELSIF condition2 THEN
   {...statements to execute when condition2 is TRUE...}

ELSE
   {...statements to execute when both condition1 and condition2 are FALSE...}

END IF;

http://www.techonthenet.com/oracle/loops/if_then.php