decimal ruler

Today, when writing a Java program, an exception occurred: java.lang.arithmeticexception:non-terminating decimal expansion; No exact representable decimal result.The statement that found the error is: 1 foo.divide(bar)); Originally in Java If you use BigDecimal to do division in the divide method must pass the second parameter, the definition of the number of

There are several ways to do this:var test=11111.111;Alert (test.tofixed (2));float data rounded to 2 decimal places;function To2bits (FLT) {if (parsefloat (flt) = = FLT)Return Math.Round (FLT * 100)/100;to 4 decimal places, return Math.Round (FLT * 10000)/10000;Elsereturn 0;}ASP retains two decimal places(888.900)The example uses all the parameters of the functi

First: limits can only be integers Direct alert if it's not an integer Second: The limit is two decimal digits Principle: Execution alert is not satisfied by the regular expression judgment. The first regular expression is the/^d+$/representation can be one or more digits The second regular expression is /^d* (?:. d{0,2})? $/ The expression must be a number at the beginning and the end of the number. Here

PHP _ retain two decimal places and rounding _ keep two decimal places without rounding php keep two decimal places and rounding $ num123213.666666; echosprintf (%. 2f, $ num); php retains two decimal places without rounding $ num123213.666666; echosprintf (%. 2f, substr (sprintf (%. 3f, $ PHP _ keep two

In the project, you use the truncation method to take two digits after the decimal point, so the following methods are written: Copy Code code as follows: Truncates a decimal value by the specified number of decimal places public static decimal ToFixed (decimal

PHP: keep the last decimal point and keep the last decimal place rounded. $ Total1225.49.5; $ totalfloor ($ total * 0.95) * 10) 10; $ totalsprintf (%. 1f, (float) $ total); echo $ total ;? Output: 1225.4php: several methods to retain the last decimal point $ Total = 1225.49.5;$ Total = floor ($ total * 0.95) * 10)/10; $ Total = sprintf ('%. 1f', (float) $ tota

JavaScript code to retain N digits after the decimal point, js to retain the decimal point In JS, The toFixed function is usually used to retain the N digits after the decimal point. Copy codeThe Code is as follows: The rounding conversion function is as follows: Copy codeThe Code is as follows:Function round (v, e ){Var t = 1;For (; e> 0; t * = 10, e --);For (;

Import Java.text.DecimalFormat; DecimalFormat DF = new DecimalFormat ("##### #0."); Double D1 = 3.23456 double d2 = 0.0; Double d3 = 2.0; Df.format (d1); Df.format (D2); 3 results were: 3.23 0.00 2.00 Java preserves two-bit decimal questions: mode one: rounding double f = 111231.5585; BigDecimal B = new BigDecimal (f); Double f1 = B.setscale (2, bigdecimal.round_half_up). Doublevalue (); Retain t

Double decimal point, double decimal point Generally, the compiler parses a literal with a decimal point into a double value. For example, a literal value is directly put into the code. Because it has a decimal point, the default value is double.The output result is: 1.12345678912345 (the last number is lost). This i

# Include # Define NUM 2# Define ZERO 0.000001 Void integer (int n){If (n> 0){Integer (n/NUM );Printf ("% d", n % NUM );}} Void decimal (double m){If (m> ZERO){M = m * NUM;Printf ("% d", (long) m );Decimal (m-(long) m );}} Void main (){Double f;Long n; Printf ("enter a decimal number :");Scanf ("% lf", f );If (f {Printf ("-");F =-f;}N = (long) f;Printf ("c

Format the float type. retain the first decimal point and the float decimal point. 1 "" exercise: 2. James's score has increased from 72 points last year to 85 points this year. Calculate the percentage point that James's score has improved. 3. format the string to display 'xx. x % ', only the first digit after the decimal point is retained: 4 "5 # NOTE: forma

I have studied how to add, subtract, multiply, and divide JavaScript decimal places. I have also done some tests and gained a lot of knowledge, you can share an interesting test with us as follows: 0.1 + 0.2 = 0.3 // falseSuddenly depressed, okay! 0.1 + 0.2 changed to: 0.30000000000000004Another 2.4/0.8 => 2.9999999999999996 cannot be converted into an integer (2.4*100)/(0.8*100)10.22 now I want to subtract the result value of 0.11 and then there wil

When I test the recharge interface, the input amount is retained to three decimal places when the program error, and later thought that the amount of money can only be retained to two digits after the decimal point, the following is the details of my implementation of jquery code, for reference only, the great God do not spray1$(function() {2 //prevent key input other than the number key3$ ("#zf_money")

Js Outputs Data exactly to the n-digit code after the decimal point, js outputs the decimal point Write two methods to output the data num to the nth digit after the decimal point. The specific content is as follows: 1. Math. pow (10, n );2. With the help of. toFixed (n) (JS 1.5 (supported by IE5.5 + and NS6 + ).Output result of the test pi = 3.14159265:Accurate

Huawei trial-convert "hexadecimal" to "decimal" and Huawei decimal Question: Convert "hexadecimal" to "decimal" Realize the algorithm of converting the "hexadecimal" to "decimal": enter a string with a hexadecimal number (all uppercase letters), and output the decimal