Round double value to 2 decimal digits

Question

I have been working with big numbers (with more that 20 digits) and for that reason I use Double . The form I get the numbers is like this 8.653762536765E28. What I want to do is just display the first 2 decimal digits. I want it like 8.65E28.

I tried to find about formatting double values but I wan't able to do it. The result I was getting was 86537...12312.00 .

What do you thing is a good approach for this case? How can I manage only the digits in front of the E (the base) and not the whole number?

score 1 · Accepted Answer · answered Jun 11 '16 at 12:33

1

I think this is what you want to achieve:

 double d = 8.653762536765E28;
 DecimalFormat df = new DecimalFormat("0.00E0");
 System.out.print(df.format(d));

answered Jun 11 '16 at 12:33

mariuss

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Yes I didn't know I could use the E like a value! thank you! – marduc812 Jun 11 '16 at 12:54

Round double value to 2 decimal digits

1 Answers1