On Jul 17, 4:13?pm, "Dee Asbury" <[EMAIL PROTECTED]> wrote: > In multiplying a value of xe^-325 with ye^-4, Python is returning zero. How > do I get it to give me back my tiny value?
Use the right tool for the right job. >>> import gmpy >>> help(gmpy.mpf) Help on built-in function mpf in module gmpy: mpf(...) mpf(n): builds an mpf object with a numeric value n (n may be any Python number, or an mpz, mpq, or mpf object) and a default precision (in bits) depending on the nature of n mpf(n,bits=0): as above, but with the specified number of bits (0 means to use default precision, as above) mpf(s,bits=0,base=10): builds an mpf object from a string s made up of digits in the given base, possibly with fraction-part (with period as a separator) and/or exponent-part (with exponent marker 'e' for base<=10, else '@'). If base=256, s must be a gmpy.mpf portable binary representation as built by the function gmpy.fbinary (and the .binary method of mpf objects). The resulting mpf object is built with a default precision (in bits) if bits is 0 or absent, else with the specified number of bits. >>> a = gmpy.mpf('3e-325') >>> a mpf('3.e-325') >>> b = gmpy.mpf('2e-4') >>> b mpf('2.e-4') >>> a*b mpf('6.e-329') > > Thanks! > Dee > > "The most exciting phrase to hear in science, the one that > heralds new discoveries, is not 'Eureka!' but 'That's funny...'" > > - Isaac Asimov -- http://mail.python.org/mailman/listinfo/python-list