Example of exact calculation of addition and subtraction in JS

  This article mainly describes how to accurately calculate the addition and subtraction in JS, the need for friends can refer to the following

/Accurate calculation of addition and subtraction. For example 0.1+0.2=0.3 or 0.1-0.2=-0.1    code as follows: function ADDFN (dataone,datatwo) {    var dataoneint= Dataone.tostring (). Split (".") [0];  var dataonefloat= "";  var datatwoint=datatwo.tostring (). Split (".") [0];  var datatwofloat= "";  var lengthone=0;  var lengthtwo=0;  var maxlength=0;    if ( Dataone.tostring (). Split ("."). length==2) {  dataonefloat=dataone.tostring (). Split (".") [1];  lengthone=dataonefloat.tostring () .length;   }  if (datatwo.tostring (). Split ("."). length==2) {  datatwofloat=datatwo.tostring (). Split (".") [1];  lengthtwo=datatwofloat.tostring () .length;   }    Maxlength=math.max (LengthOne, Lengthtwo);  for (var i=0;i<maxlength-lengthone;i++) {  dataonefloat+= "0"; }  for (Var i=0;i <maxlength-lengthtwo;i++) {  datatwofloat+= "0"; }   /**  * Two data magnification   * make it all integers. Because the integer calculation   * is more accurate.   */  var one=dataoneint+ "" +dataonefloat;  var two=datatwoint+ "" +datatwofloat; //alert ("DataOne: +dataone+" DataTwo: "+dataTwo +" one: "+ One+ "Two:" +two;   /**  * Data enlarged multiple, computed to result,  * Then narrowing the same multiple   * and getting the correct results   */  var result = (number (one) +number (two))/math.pow (10,maxlength);    return result;   }