Hi I just noticed that some constants accept letters in either upper or lower case, whereas others only accept lower case.
>From the documentation, it would appear that only lower case should be allowed. Also, it seems that d and e are interchangeable, although I can't find any mention of e in the documentaion! 1p1 3.14159 1P1 |ill-formed number 1x1 2.71828 1X1 |ill-formed number 1d1 10 1D1 10 1e1 10 1E1 10 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm