JavaScript rounding function code sharing (retaining the last few digits)_javascript skills

Let’s just look at the code

Parameter 1: Number to retain decimal places

Parameter 2: Number of digits to retain

Copy code The code is as follows:

function FormatNumber(srcStr,nAfterDot){
var srcStr,nAfterDot;
var resultStr,nTen;
srcStr = "" srcStr "";
strLen = srcStr.length;
dotPos = srcStr.indexOf(".",0) ;
if (dotPos == -1){
resultStr = srcStr ".";
for (i=0;i resultStr = resultStr "0";
}
}
else{
if ((strLen - dotPos - 1) >= nAfterDot){
nAfter = dotPos nAfterDot 1;
nTen =1;
for (j=0;j nTen = nTen*10;
}
resultStr = Math.round(parseFloat(srcStr)*nTen)/nTen;
}
else{
resultStr = srcStr;
for (i=0;i<(nAfterDot - strLen dotPos 1);i ){
resultStr = resultStr "0";
}

}
}

return resultStr;

}