problem regarding exponetial

[ajit107]

-9.998571264E+18 ,i want to calculate the exponential of this no. ,my result comes zero plz help ,

[GerdW]

Hi ajit,

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@ajit107 wrote:

-9.998571264E+18 ,i want to calculate the exponential of this no. ,my result comes zero plz help ,

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So you want to calculate e^(-1E+19) - and now you wonder why you get 0 as result?

It's the correct answer (in terms of floating point algebra)! What is your expected result?

Using LabVIEW I get these results:

e^(-100) = 3.72e-44

e^(-200) = 1.38e-87

e^(-300) = 5.15e-131

e^(-500) = 7.12e-218

e^(-700) = 9.86e-305

e^(-745) = 4.94e-324

minimum value for DBL…

[altenbach]

As Gerd already said, zero is correct. We cannot help you to get a different result.