javascript round to 2 decimal

For some decimal point after a number of floating-point numbers, we may only need to retain 2 bits, but JS does not provide such a direct function, so we have to write the function to implement this function, the code is as follows: Copy Code code as follows: function Changetwodecimal (x) { var f_x = parsefloat (x); if (isNaN (f_x)) { Alert (' Function:changetwodecimal->parameter error

Today, when processing data, the foreground interface amount needs to retain two decimal places, so only JavaScript can be used for interception.var regex =/([0-9]+\.[ 0-9]{2}) [0-9]*/;var Localmoney = 6002.3310;Localmoney = localmoney.tostring (). Replace (Re, "$");In this way, the amount to be 6002.33------------------------------------------------------------I

1 DOCTYPE HTML>2 HTMLLang= "en">3 Head>4 MetaCharSet= "UTF-8">5 title>Format-numbertitle>6 Head>7 Body>8 inputtype= "text"ID= "Input">inputtype= "text"ID= "Output">9 Body>Ten Script> One varIPT=document.getElementById ('input'); A varopt=document.getElementById ('Output'); - Ipt.oninput=function(){ - Opt.value=Zero ( This. value); the } - functionZero (num) { - varStr=num.tostring (); - if(Str.indexof (".")==-1){//integer +

1 DOCTYPE HTML>2 HTMLLang= "en">3 Head>4 MetaCharSet= "UTF-8">5 title>Format-numbertitle>6 Head>7 Body>8 inputtype= "text"ID= "Input">inputtype= "text"ID= "Output">9 Body>Ten Script> One varIPT=document.getElementById ('input'); A varopt=document.getElementById ('Output'); - Ipt.oninput=function(){ - Opt.value=Zero ( This. value); the } - functionZero (num) { - varStr=num.tostring (); - if(Str.indexof (".")==-1){ + returnNu

How to solve multiple decimal places in Javascript decimal operations? Multiple decimal places in js decimal operations Share with you an interesting test: 0.1 + 0.2 = 0.3 // falseSuddenly depressed, okay! 0.1 + 0.2 changed to: 0.30000000000000004Another 2.4/0.8 => 2.9999999

function Changetwodecimal_f (x) { var f_x = parsefloat (x); if (IsNaN (f_x)) { Alert (' Function:changetwodecimal->parameter error '); return false; } var f_x = math.round (x * 100)/100; var s_x = f_x.tostring (); var pos_decimal = S_x.indexof ('. '); if (Pos_decimal Pos_decimal = S_x.length; S_x + = '. '; } while (s_x.length s_x + = ' 0 '; } return s_x;}Reference Link: http://www.jb51.net/article/45884.htmJS reserved

) + "," + newStr; // if it is a multiple of 3, add ","} else {newStr = str. charAt (I) + newStr; // concatenate characters one by one} count ++;} str = newStr + (str + "00 "). substr (str + "00 "). indexOf (". "), 3); console. log (str)} formatNum ('100. 13213. 24 '); // output 13,213.34 formatNum ('100. 000. 2 '); // output 132,134.20 formatNum ('20160301'); // output 132134 formatNum ('20160301. 236 '); // output 132,134.236

This article mainly introduces the simplest JavaScript Regular Expression for verifying integers, decimals, real numbers, and valid decimal places, this includes retaining 1 decimal places, 2 decimal places, and 3 decimal places.

This article mainly introduces the simplest JavaScript regular expression for verifying integers, decimals, real numbers, and valid decimal places, this includes retaining 1 decimal places, 2 decimal places, and 3 decimal places.

It is the result of Lua's computation. We can see that the computation result is very accurate. It is the calculation result of Python3. We can see that the calculation result is inaccurate: the decimal computation in JavaScript is also inaccurate. Why is the decimal computation result often inaccurate in JavaScript? S

Javascript Regular Expression decimal type, regular expression decimal If you want to read and understand it, read it. If you only need results, jump to the end of this article. I used to use a javascript Regular Expression to match the decimal type. What I wrote earlier was

Convert any decimal places into 2, 3, 4, 5, 6, 7, 8, and 9 decimal places, retain 8 digits after the decimal point, and output. For example, if the decimal point is 0.795, the output is: Decimal

This question is a simulation. The general steps for decimal scores can be viewed in my previous BLOG. It is only divided by the power of the digits of 10, and then about a minute. This is also the case. It is complicated to process infinite decimal places. There are three situations: 1. Pure cyclic decimal 2. Pure non

Question: Click to open the link This question is a simulation. The general steps for decimal scores can be viewed in my previous blog. It is only divided by the power of the digits of 10, and then about a minute. This is also the case. It is complicated to process infinite decimal places. There are three situations: 1. Pure cyclic decimal

Problem description: When using EF's dbcontext to save the decimal type data to the database, the default is to save only the first 2 decimal places after the decimal point, the remaining 0 ; For example, save 101.182352152322, the actual data stored in the database is 101.180000000000;Workaround: When creating the pro

We want to modify the display format of a page's data, which requires two steps:1. In JS through $ ('. Class1. Class2 Li:eq (2) Span.value '). Text (). Trim (); A similar statement gets the contents of the data.2. Modify the data to the desired format. (eg:data=10 ==> 9+1)If we get the data value is an integer, then no problem, things will go well, as expected results.But if you take a

1. The dumbest way ... [I'll do what I do ...]function Get (){var s = 22.127456 + "";var str = s.substring (0,s.indexof (".") + 3);alert (str);}2. Regular expression effect is good3. He is more clever ...4. Friends who will use new things .... But we need ie5.5+ to support it.from:http://xinlingwuyu.javaeye.com/blog/175931JS retains 2 decimal places after the

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

Article from: Struts2 tags (take) keep several decimals (keep 2 decimal places, keep 4 decimal places), date type conversion processor Add the following configuration in the internationalization configuration file Struts2 #保留两位小数 global.format.number = {0,number,###,## #0. xx} #两位小数加% global.format.percent = {0,number,# #0.00 }% Global.format.money = {0,n

I have such a set of data Pseudo-code (now saved with a string, then converted) "buy": [{ "p": "1698.64000", "n": "0.117" }, { "p": "1698.63000", "n": "5.000" }, { "p": "1696.54000", "n": "0.128" }, { "p": "1696.34000", "n": "0.176" They have fixed decimal places, p is fixed and there are up to 2 significant digits after the decimal