In. when operating databases in. net, we recommend that you use parameterization to pass values. However, this may cause some doubts, for example, how can we maintain the same precision and decimal places as in the database when using decimal?
You can use the precision and scale attributes of the parameter, for examp

Java precision calculation code, specifying precise decimal places and java precision code digits
Java code:
Public class App2 {public static void main (String [] args) {String val = checkNumber ("10.1234155", 2, 6 ). toString (); System. out. println (val);} public static BigDecimal checkNumber (String number, int min, int max) {// initialize to the max DecimalF

Note that if the result is an infinite number of decimal places, you will get an error if you do not specifyImport Java.util.scanner;import Java.math.bigdecimal;public class Main {public static void main (String args[]) {Scanner in = new Scanner (system.in); BigDecimal a = In.nextbigdecimal (); BigDecimal B = in.nextbigdecimal (); System.out.println ("Add" + a.add (b)); System.out.println ("Sub" + a.subtract (b)); System.out.println ("Mul" + a.multipl

JavaDecimalFormat dcmfmt = new DecimalFormat ("0.00");Double db = 12333.353;System.out.println (Dcmfmt.format (db));JsJava, medium double precision double control retains two decimal places, JS controls two decimal places

Note If the result is an infinite number of decimal places, you will get an error if you do not specify a digit roundingImport Java.util.scanner;import Java.math.bigdecimal;public class Main {public static void main (String args[]) {Scanner in = new Scanner (system.in); BigDecimal a = In.nextbigdecimal (); BigDecimal B = in.nextbigdecimal (); System.out.println ("Add" + a.add (b)); System.out.println ("Sub" + a.subtract (b)); System.out.println ("Mul"

-precision floating-point numbers.1.round () built-in methodThis is the most used, just looked at the use of round () explanation, is not very easy to understand. Round () is not a simple rounding process.For the built-in types supporting round (), values is rounded to the closest multiple of ten to the power minus ndigits; If double multiples is equally close, rounding is do toward the even choice (so, for example, both round (0.5) and round (-0 .5)

directly if even this upward trade-off. Look at the following example:
12345678910
>>>round(2.635,2)2.63>>>round(2.645,2)2.65>>>round(2.655,2)2.65>>>round(2.665,2)2.67>>>round(2.675,2)2.67
2. Use formattingThe effect and round () are the same.
123456789
>>> a=("%.2f"%2.635)>>> a‘2.63‘>>> a=("%.2f"%2.645)>>> a‘2.65‘>>> a=int(2.5)>>> a2
Precision analysis requiring over 17 bitsPython defaults to 17

SQL Server 2005 books online (September 2007)
Precision, decimal places, and length (TRANSACT-SQL)
Precision is the number of digits in a number. The number of decimal places is the number to the right of the decimal point in the number. For example, the

Reason: JS in accordance with the 2 to deal with decimal subtraction, on the basis of arg1 arg2 precision extension or reverse expansion matching, so will appear as follows.
JavaScript (JS) decimal point subtraction problem, is a JS bug such as 0.3*1 = 0.2999999999, the following list can be perfect to find the corresponding accuracy of the four JS algorithm

What is precision: The total number of decimal digits that can be stored, including the left and right digits of the decimal point. The precision must be a value from 1 to the maximum precision 38. The default precision is 18.
Sca

When defining the data type decimal of a column in sqlserver, the precision and number of decimal places must be specified.
When defining a column's data type decimal in SQL server, you must specify its precision and number of decimal

Title: Loss of precision for JavaScript decimal and large integersAuthor: DemonLinks: http://demon.tw/copy-paste/javascript-precision.htmlCopyright: All articles of this blog are subject to the terms "Attribution-NonCommercial use-share 2.5 mainland China" in the same way.Let's look at two questions first:
0. 0. 0. 3//False10000000000000000//True
The first problem is the problem of

value, rounding out the decimal part of value. The type returned by floor () is still float, because the float value is usually larger than the integer.Example 1. Floor () example
Copy Code code as follows:
echo floor (4.3); 4
echo Floor (9.999); 9
?>
Third, round-to rounding floating point numbers
DescriptionFloat round (float val [, int precision])Returns the result of roun

In Oracle, the Number type can be used to store 0, positive, negative, or floating point numbers. The data range can be 1.0*10 (-130) mdash; 9. 9... 9*10 (125)
In Oracle, the Number type can be used to store 0, positive, negative, or floating point numbers. The data range can be 1.0*10 (-130) mdash; 9. 9... 9*10 (125)
In Oracle, the Number type can be used to store 0, positive, negative, or floating point numbers. The data range can be 1.0*10 (-130) -- 9. 9... 9*10 (125) {38 9 followed by

In Oracle, the Number type can be used to store 0, positive, negative, or floating point numbers. The data range can be 1.0*10 (-130) -- 9. 9... 9*10 (125) {38 9 followed by 88 0} digits. When the value of the mathematical expression in Oracle is greater than or equal to 1.0*10 (126, oracle Reports an error.
The data declaration of Number is as follows:
Description
Number (p, s) declares a fixed point p (precision) as the

decimal point output precision control problem
SETF () is a function that appends the label word, and flags () is the label word
Fixed flag is to display floating-point numbers in fixed-point form
When there is a fixed mark, indicating that the data according to a certain number of digits output, or remove the fixed mark, the data in situ output---that is the number of the last 0 does not show
Therefore, th

0 x + 1 x 1/8 = 0.125)Step TwoThe highest bit of floating-point number is positive or negative, 1 is positive, 0 is negativeThe second high position indicates the positive or negative of the exponent, 1 is positive, and 0 is negative.110.001 = 1.10001 x 2 x 2Index is 4-->0000 100 (seven bit binary)The end result is1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1The objects stored by TreeSet and TREEMAP require the implementation of the comparable interface, because both of the st

top are two more pixels below IE7 and IE7.The second JS native final style method, that is, currentstyle and getComputedStyle compatible notationvar oabc = $ ('. Element ') [0];if (Oabc.currentstyle) { IE, Opera alert (oAbc.currentStyle.width); var elementx = parsefloat ($ ('. Element ') [0].currentstyle.left]. toFixed (2); var elementy = parsefloat ($ ('. Element ') [0].currentstyle.top]. toFixed (2);} else { FF, Chrome, Safari var elementx = parsefloat (getComputedStyle ($ (

In business systems, different customers have different approaches to decimal processing
By setting the number of reserved decimal places, as well as the number of decimal digits after the processing method, you can flexibly meet customer requirements
Processing method Tables
ID Number (1),--Set ID
Amountdot number (4,2) DEFAULT 0.01--The amount of

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