System.out.println(Math.pow(10 , -10));
I wrote this line and output should be 10.0E-10 , right? But instead it shows 1.0E-10 . What might be the reason behind this?
-
how? would you care to explain?Faizan Ahmad– Faizan Ahmad2018-12-09 18:03:40 +00:00Commented Dec 9, 2018 at 18:03
-
21 * 10^-10 is what Java is giving you.Hovercraft Full Of Eels– Hovercraft Full Of Eels2018-12-09 18:05:44 +00:00Commented Dec 9, 2018 at 18:05
-
@FaizanAhmad Please consider accepting the answer that you think is the best.Sweeper– Sweeper2018-12-10 14:10:26 +00:00Commented Dec 10, 2018 at 14:10
Add a comment
|
2 Answers
The notation xey means x*10^y.
Math.pow(10 , -10) means 10 raised to the power -10, or 10^-10. This is equal to 1*10^-10, which expressed in the xey notation, is 1e-10.
Comments
10.0E-10
means
10.0 x 10-10
But
Math.pow(10 , -10)
means
10-10
If you want a handy way to work with 10.0E-10 try
System.out.println(new BigDecimal("10.0E-10"));
Output: 1.00E-9
or
System.out.println(Double.valueOf("10.0E-10"));
Output: 1.0E-9
Which is best depends on which consideration is more important to you. Respectively: faithfully matching storage to presentation in base 10 or performance.
