Example of accurate calculation of addition and subtraction in js

/Precise addition and subtraction. For example 0.1+0.2=0.3 or 0.1-0.2=-0.1

The code copy is 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";

}

/**

*Multiple amplification of two data

* Make them all become integers. Because integer calculation

*More accurate.

*/

var one=dataOneInt+""+dataOneFloat;

var two=dataTwoInt+""+dataTwoFloat;

//alert("dataOne:"+dataOne+" dataTwo:"+dataTwo +" one:"+one+" two:"+two);

/**

*After the data is expanded, the calculated result will be

* Then shrink the same multiple

*Then get the correct result

*/

var result= (Number(one)+Number(two))/Math.pow(10,maxLength);

return result;

}