Math.getExponent function

Asked May 18 '18 at 15:36

Active May 27 '18 at 09:10

Viewed 126 times

I am trying to use the below code for one of my apps, and it requires the use of the exponential function:

YPO = ((590 * (Math.getExponent((n2 / n1) * 258.2))) / 1.12) / 60;

Where n1 and n2 are any number between 0.1 to 0.9

The problem is I am getting YPO = 0, but when I am calculating (n2 / n1) * 258.2, I am getting a decimal number. Its exponential shouldn't be zero, but still it is giving output as zero. Can someone please let me know if I am using the above mentioned function correctly?

the relevant code of my app:

edited May 27 '18 at 09:10

James Z

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asked May 18 '18 at 15:36

Ashish

Reverify the type of your variables – le Mandarin May 18 '18 at 16:11
Its of double type – Ashish May 18 '18 at 19:57
When n1, n2 and YPO are double, i obtain non zero value. What's the value of n1 and n2 ? – le Mandarin May 19 '18 at 12:51
Its 0.5 and 0.6 respectively, but you can take any number between 0.1 and 0.9 – Ashish May 19 '18 at 14:00
I get answer 70.23809523809523 – le Mandarin May 19 '18 at 14:11
I am still getting zero! Have you done any modifications? I have edited my question and added a screenshot too, can you please have a look and let me know? – Ashish May 19 '18 at 17:21
I see now. You have not initialized any of your variables. By default, the compiler will assign the values 0.0d to n1 and n2 and generate an alert. – le Mandarin May 19 '18 at 18:50
Thanks for the constant reply Mandarin! I have initialized the variables now, below is the code: public double n1 = 1.0d; public double n2 = 1.0d; public double n3 = 1.0d; I am still getting output as zero, what else can I do :( – Ashish May 21 '18 at 19:59
Can you please share your code and let me know how have you implemented the same? – Ashish May 21 '18 at 20:04
double n1 = 0.5,n2=0.6; double YPO = ((590 * (Math.getExponent((n2 / n1) * 258.2))) / 1.12) / 60; – le Mandarin May 25 '18 at 08:34
import java.lang.Math – le Mandarin May 25 '18 at 08:35
What do you mean by "the exponential function"? I guess you probably wanted `Math.exp` instead of `Math.getExponent` (which behaves more like a logarithm of base 2). – Henry May 27 '18 at 09:15
@leMandarin I don't want to hard code the values, I am taking input from the user, that is why I haven't initialized the n1 and n2. Is there any other way of doing the same? – Ashish May 29 '18 at 19:42
Display the recovery code of one of your entries please – le Mandarin May 31 '18 at 06:47

Math.getExponent function

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