casting float8 type

Hello everyone,

I apologize if this seems elementary to you, but I just spent quite a
bit of time searching the archives and the documentation for a way to do
this.  I may have been looking wrong, but I tried to look in all of the
"obvious" places. Anyway...

How would I go about converting a value of type 'float8' to a value of
type 'int'?  It's probably not possible to do a straight conversion of a
float to an int, but is there a truncate, or a rounding function that I
could use?  I couldn't find such a thing in my search.

Thanks in advance,

Bob