The exact calculation of JS floating-point numbers

  This article mainly introduces the precise calculation of JS floating-point number (add, subtract, multiply, divide) the need for friends can come to the reference, I hope to help you.

The code is as follows: <span style= "font-size:18px" >//Description: JavaScript addition results will be error, in two floating-point number added is more obvious. This function returns a more precise addition result.   //Call: Accadd (ARG1,ARG2)   //return value: Arg1 plus arg2 exact result    function Accadd (arg1,arg2) {       VAR r1,r2,m;       try{r1=arg1.tostring (). Split (".") [1].length}catch (e) {r1=0}       try{r2=arg2.tostring (). Split (".") [1].length}catch (e) {r2=0}       M=math.pow (10,math.max (R1,R2))       return (arg1*m+arg2* m)/m  }</span>     code as follows: <span style= "font-size:18px" >    //Description: JavaScript subtraction results will be incorrect Difference, the addition of two floating-point numbers will be more obvious. This function returns a more accurate subtraction result.   //Call: Accsub (ARG1,ARG2)   //return value: arg1 exact result of arg2 reduction    function Accsub (arg1,arg2) {           return Accadd (ARG1,-ARG2);  }</span>    Code is as follows: <span style= "font-size:18px" >    //Description: JavaScript multiplication results will be error, It is more noticeable when multiplying two floating-point numbers. This function returns a more accurate result of the multiplication.   //Call: Accmul (ARG1,ARG2)   /return value: Arg1 times arg2 Exact result    function Accmul (arg1,arg2)   {    & nbsp var m=0,s1=arg1.tostring (), s2=arg2.tostring ();       Try{m+=s1.split (".") [1].length}catch (e) {}       Try{m+=s2.split (".") [1].length}catch (e) {}       return number (S1.replace (".", "")) *number (S2.replace (".", ""))/math.pow (10 , m)  }</span>    code is as follows: <span style= "font-size:18px" >    //Description: JavaScript division results will be error , which is more obvious when dividing two floating-point numbers. This function returns a more precise division result.   //Call: Accdiv (ARG1,ARG2)   //return value: Arg1 divided by arg2 exact result    function Accdiv (arg1,arg2) {       VAR t1=0,t2=0,r1,r2;       try{t1=arg1.tostring (). Split (".") [1].length}catch (e) {}       try{t2=arg2.tostring (). Split (".") [1].length}catch (e) {}       with (Math) {          R1=number (arg1.tostring (). Replace (".", ""))           R2=nUmber (Arg2.tostring (). Replace (".", ""))           return (R1/R2) *pow (10,T2-T1);      }  }</span>