Brian wrote: > I was most surprised by the result [of ''+1 ] because > it was not an error and because the result was an empty
Ah, after I posted I'd wondered if I'd answered the wrong question. I'll post a more considered reply later (the technical answer is related to my original reply). But, for now, you might take the outlook that x+y adds all corresponding pairs of numbers in x and y . In your example, x is empty, so there are zero pairs of numbers; consequently, zero additions are performed, producing an empty result. That it was not an error is a direct consequence of the rule I hightlighted in my original reply. -Dan ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
