> Is there anyway to set how many numbers are used after > the decimal in floating numbers?
There are a couple of options. Usually you just want to display the 2 digit accuracy but keep the real value as accurate as possible. The easiest way to do that is to use format strings (as described in the Simple Sequences topic of my tutorial). Basically: >>> print "%7.2f" % 123.45678901 123.46 >>> Notice the space at the front. I asked Python to print the digit with 7 characters and a max of 2 after the decimal point (which is itself one of the 7 characters!). There is a wealth of other options you can use with format strings, see my tutor for more examples, or the reference documents for the full story. > It would be nice if the answer could be rounded > to 2 decimal spots, instead of the ten millionths spot. If you really want to round the answer so it always has two decimal digit precision you can use the round() function after multiplying aby 100: >>> print round(123.4567 * 100)/100 123.46 In theory you can use round itself to do this but because of how floats are represented in binary you don't always get what you expect: >>> round(1213.84567,2) 1213.8499999999999 >>> But usually simply controlling the display witrh a format string is all you want to do. HTH, Alan G Author of the Learn to Program web tutor http://www.freenetpages.co.uk/hp/alan.gauld _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
