jquery - how to round up if value is two decimal and format as 3 decimals in javascript? -


test cases:

var num1 = 10.66; var num2 = 10.7898

the function found on stackoverflow:

function formatusercurrencyvalue(fieldvalue){     var num = parsefloat(fieldvalue);     var str = num.tofixed(10);     str = str.substring(0, str.length-7);     return str; };

i result this: if 10.66 10.670 , if 10.78998 10.789. if value has 2 decimal places result should round first , format 3 decimals. if more 2 decimals (eg. 10.78998) 10.789, trimming out values after 3 decimals.

could please tell me how can achieve this? tried above function others found result not expected 10.66 scenario. getting 10.660 instead of 10.670.

it looks similar question has been asked here: formatting number 2 decimals in javascript

i liked answer @miguel had. using function conversion.

 function precise_round(num, decimals) {  var t=math.pow(10, decimals);      return (math.round((num * t) + (decimals>0?1:0)*(math.sign(num) * (10 / math.pow(100, decimals)))) / t).tofixed(decimals);      }

then use function. precise_round(num,3)


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