Is Function a data type,or an object ?

Well...what is it actually?
And is it true that for every declared function in the script,the interpreter automaticaly converts it to an object ?

an object is a data type. a function is a kind of object.

I think it should of be more like this:
Is a function a separate data type from an object ?

loosely, object is the super class. function is the sub class. a function is a kind of object.

The Object prototype is the base prototype to which everything belongs. Function, Number, Array, Boolean, Null, Undefined, String, RegExp, Error prototypes do all inherit directly from the Object prototype.