select abs(13.4),abs(10*12)from dual;
select ceil(10.001),ceil(-1.99)from dual;
select floor(10.001)from dual;
select mod(11,3)from dual;
select power(10,3)from dual;
select round(12.23,1)from dual;
select sin(60)from dual;
select sqrt(25)from dual;
select truncate(255.3005,1)from dual;
select ascii('a')from dual;
select length('computer')from dual;