For Try-catch-finally you could import the 'vl.core.experimental' pack from the node browser and look for those regions. I'm not sure how heavily they've been road tested...
@bjoern, @microdee, Good points.
In the case of floats/doubles you may want to express that the number calculated is infinite or undefined, as you have this situation in mathematics/science. You would want to actually return this value in those circumstances because it isn't an 'exception' as such, its a valid real number, just an extreme one.
In the case of integers they are not 'real' numbers so the 'infinite' and 'undefined' aren't concepts handled by that data type.