Re: Puzzled by IntegerPart

*To*: mathgroup at smc.vnet.net*Subject*: [mg114681] Re: Puzzled by IntegerPart*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Mon, 13 Dec 2010 03:50:17 -0500 (EST)

On 12 Dec 2010, at 11:40, Themis Matsoukas wrote: > Round and Rational have solved the problem. But I am curious, why do the phantom decimals not show with N? > > N[100*1.15, 20] > > 115. > > > Themis > This does not make sense (in Mathematica). 100*1.15 is a machine precision number: In[55]:== Precision[100*1.15] Out[55]== MachinePrecision and applying N[?,20] to a MachinePrecision number does nothing at all. If you want a to convert it to a higher precision number as output you should use: SetPrecision[100*1.15, 20] 114.99999999999998579 If you only want to pad the output with zeros you can do: NumberForm[100*1.15,{3,17}] 115.00000000000000000 All of this is actually fully documented. Andrzej Kozlowski