PostgreSQL, Format Float

Question

I try to format numeric field

select to_char(12315.83453, 'FM999999999999D9999')

in this case all its OK. Result is 12315.8345

But if value is between 0 and 1

select to_char(0.83453, 'FM999999999999D9999')

result is .8345 without 0 (zero) but I need 0.8345.

What kind of format should be indicate to to_char function to obtain result what I need?

Answer 1

SELECT to_char(0.83453, 'FM999999999990D9999');

I just changed the 9 before format D to 0.