Questions: This question already has an answer here: Round to at most 2 decimal places (only if necessary) 42 answers Answers: NOTE – See Edit 4 if 3 digit precision is important var discount = (price / listprice).toFixed(2); toFixed will round up or down for you depending on the values beyond 2 … How to round a number to n decimal places in Java (20) @Milhous: the decimal format for rounding is excellent: You can also use the .

I think we should provide a solution that works in all cases of myVal. if the decimal to be rounded is 5, it always rounds up to the next number. your coworkers to find and share information. An integer such as 5 will become “5.00”, with two zeros being appended behind the decimal place. Not specifically for the value you stated. However, if one is working with non-exact numbers, one must recognize that any value That's my preferred solution.

there should not be any trailing zeroes.which is great, however it always displays numbers with 5 decimal places even if they are not significant: However as you can see this uses half-even rounding. Your problem is probably the same as why you are printing the wrong output in your question itself (new BigDecimal("10.12556").setScale(2, BigDecimal.ROUND_HALF_UP) is 10.13, not 10.12) as your printed. There simply are inherent problems when converting from floating point numbers to real decimal numbers. Here's a way without any Java libs:DecimalFormat is the best ways to output, but I don't prefer it. The intermediate result of 265.335 * 100 (precision of 2 digits) is 26533.499999999996. This is a supplemental answer to provide that.Numbers are rounded to the nearest whole number.

Anyways So after reading most of the answers, I realized most of them won't be precise, in fact using Rounding mode to round towards "nearest neighbor" unless both

So for example "34.49596" would be "34.4959" "49.3" would be "49.30" Can this be done using the String.format command? trailing zeroes) and will return: DecimalFormat took 14ms to complete the 200 loops, this method took less than 1ms. It goes to the Any decimal value is rounded down to the next integer. Hello, Can you share Java code or script for finding P-value of large data sets:- computers don't bother processing their thinking in decimal notation. If you print the output of interestedInZeroDPs before Math.round it will print 100.49999999999999. See Matthias Braun, the solution is fine, hence 31 ups.. 1.505 decimal is stored in floating point double as 1.50499998 if you want to take 1.505 and convert from double to decimal, then you have to convert it to Double.toString(x) first then put it into a BigDecimal(), but that is extremely slow, and defeats the purpose of using double for speed in the first place.Ran a loop of 100k with BigDecimal (took 225 ms) and Math.round (2 ms) way and here is the timing...Time Taken : 225 milli seconds to convert using to : 9232.13 Time Taken : 2 milli seconds to convert to : 9232.13 yes this is exactly what math.round does for positive numbers, but have you tried this with negative numbers? change the caret format (i.e. The string “9.01345” was rounded to 9.01.

Very simple and you are basically updating the variable instead of just display purposes which DecimalFormat does. The number of zeros indicate the number of decimals.As some others have noted, the correct answer is to use either I am posting the following code as a counter-example to all the answers in this thread and indeed all over StackOverflow (and elsewhere) that recommend multiplication followed by truncation followed by division. I'm surprised Chris Cudmore would even say what he said to be honest. If the value is 3 00.1234, it should be formatted to 3 00.12. It fails for something as simple as 265.335. What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. Rounding off in Java - Round two decimal places In this section, you will learn about how to round the figure up to two decimal places in java.

The basic syntax of the round Function in Java Programming language is as shown below. There are a couple of ways to achieve the rounding. This method returns a This is similar to round in that decimal values round to the closest integer. Note: if the desired number of decimals are higher than the actual number, zeros are added to create the desired decimal length. Both are methods that Java provides. The trick is to set variable pp to 1 followed by n zeros. 0 votes. DecimalFormat df = new DecimalFormat("#.00000"); df.format(0.912385); to make sure you have the trailing 0's. That is it will round down if the previous digit is even. I looped using DecimalFormat 200 times, and this method. print upto 6 decimal places java (9) For two rounding digits. enter a decimal, e.g. appearance - as well as the level of rounding precision set. within the brackets). Use String.format() if you need the value as ...READ MORE. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under If you have a list of numbers with 3 decimal places, you want them to all have the same digits even if it's 0.The trick is that in all of your 9251 errors, the printed result is still correct. in a GUI for numbers as big as ################################# characters (as an Refutation, refuted here. It is incumbent on advocates of this technique to explain why the following code produces the wrong output in over 92% of cases.