Hi all,

Forgive my newbieness,... but what does the following snippet mean (from
some J code that it is now my responsibility to maintain):

if.  rtn e.<'NO'  do.

I understand "if." And "do.", just not the part in the middle; I assume
it has something to do with testing for equalituy.  "rtn" is the value
given by a window interface thingy.

On a related note, I would like to print a string with the value of
return and some text concatenated to it, but the following snippet gives
me a "domain error"

'return value:', rtn 1!:2(2)

I think rtn might be boxed, or something, but I can't figure it out.  If
it were a C-ish language, I would be writing "printf("return value: %s",
rtn);". 

Finally, if there is a way to unbox a variable, it would be great to
hear about it.

Thanks!

---
W. Webb Sprague
Forecast Analyst
Office of Financial Management, Forecast Division

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