I think Ina Sollinger wrote: > > (0.9 + 0.9 + 0.6) / 3 )*1. > > jess calculates 0.7999999942sth. instead of 0.8,
Again, 0.8 can't be precisely represented as a floating point number. > however it would be nicer if i could manage to tell jess > "round the result to the 1st digit after the coma" > so it would be rounded to 0.8. > Note that Java *can't* "round 0.7999999942 to 0.8", because 0.8 simply can't be represented exactly as a floating-point number. What it *can* do, however, is render a number as a string, accurate to a specific number of decimal places -- not the same as rounding. Jess offers the (format) function which can produce floating-point numbers formatted to your specifications. For example, the function call (format nil "%.2f" 0.9999) returns the string "1.00". --------------------------------------------------------- Ernest Friedman-Hill Distributed Systems Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 Org. 8920, MS 9012 [EMAIL PROTECTED] PO Box 969 http://herzberg.ca.sandia.gov Livermore, CA 94550 -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
