Number of decimal digits in a double [closed]

Question

How do I determine number of integer digits and the number of digits after decimal in a number like 234.12413 in Java.

Answer 1

A double is not always an exact representation. You can only say how many decimal places you would have if you converted it to a String.

double d= 234.12413; String text = Double.toString(Math.abs(d)); int integerPlaces = text.indexOf('.'); int decimalPlaces = text.length() - integerPlaces - 1; 

This will only work for numbers which are not turned into exponent notation. You might consider 1.0 to have one or no decimal places.