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Thread: Need Help With Equation in Java
 02082013, 02:32 AM #1Member
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Need Help With Equation in Java
I just started Java and this is probably a dumb question. I am trying to put the following equation into Java:
In Java I typed the following (this is just a test program, my actual one has commenting/prompts):
final double FACTOR = 1/30;
double b = 0.0;
double n = 0.0;
double p = 0.0;
double dailyInterest = 0.0;
double apr = 0.0;
apr = kb.nextDouble();
b = kb.nextDouble();
p = kb.nextDouble();
dailyInterest = apr/365;
n = FACTOR*((Math.log(1+(b/p)*(1(Math.pow(1+dailyInterest,30)))/Math.log(1+dailyInterest))));
I've tried to break it apart a few different ways and as separate variables to clean it up, but the answer I get is always "NaN" for my n value (the values I am trying to use are 13.65 for apr, 2013 for b, and 25 for p; test values provided by the professor).
Any ideas on why this would be occurring?
 02082013, 02:59 AM #2Member
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Re: Need Help With Equation in Java
check the value of Factor, I didn't have time to compile and test it out, but if what you wrote is exactly what you had, you may have a data type issue.
so put this somewhere:
System.out.println(FACTOR);
edit I imagine you know what i am pointing out since all of your other values are properly initialized.Last edited by lenois; 02082013 at 03:01 AM.
 02122013, 01:50 AM #3Member
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 02122013, 06:44 AM #4
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Re: Need Help With Equation in Java
If 'apr' is 'annual percentage' then i= (apr/365)/100;
kind regards,
JosBuild a wall around Donald Trump; I'll pay for it.
 02122013, 04:04 PM #5Member
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