There are a number of ways to assign a value to a variable.
SQL> SQL> declare-- from www . ja v a 2s . c om 2 v_length_nr NUMBER DEFAULT 5; 3 v_height_nr NUMBER := 4; 4 v_width_nr NUMBER; 5 v_volume_nr NUMBER; 6 v_min_nr NUMBER; 7 8 begin 9 v_width_nr := 3; 10 v_volume_nr:= v_length_nr*v_width_nr*v_height_nr; 11 v_min_nr := least(v_length_nr,v_width_nr,v_height_nr); 12 13 DBMS_OUTPUT.PUT_LINE(v_width_nr); 14 DBMS_OUTPUT.PUT_LINE(v_volume_nr); 15 DBMS_OUTPUT.PUT_LINE(v_min_nr); 16 end; 17 / 3 60 3 PL/SQL procedure successfully completed.