exp statment

i ask how i write mathametical equation with exponenital as the follow
     y = exp (-100 * x);
 but i have the floating overflow error at run time , so i ask  if i can write this equation
  using ( ln) statement instead of exp and if yes how can i write the y expresion
  bu using ln ..
    please answer me quickly ..
      Thank .. Saleh
salehAsked:
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jlove1Commented:
well, i CAN't tell you how to do it using LN cause it's too difficult to even explain why I can't do it.  but I CAN tell you how to make your code work. Like this
y=exp(-100*x)/100000;
then whenever you're using the number in an equation, simply multiply it by 100000


This should work under almost every circumstance.
You do realize that you're winding up with a HUGE number

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ozoCommented:
What is the range of x?

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salehAuthor Commented:
x is the real number between [0 , 2 ]



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