JS decimal Take Integer

1. Discard the fractional part, preserving the whole number of parts

parseint ()

22.127456 take into 22.13 parseint (5/2)

2 rounding up, with decimals on the integer part plus 1

Math.ceil (5/2)

3, rounded.

Math.Round (5/2)

4, rounding down

Math.floor (5/2)

5 interception (most primitive)

function Get ()
{
var s = 22.127456 + "";
var str =
S.substring (0,s.indexof (".") + 3);
alert (str);
}

6 Regular Expressions

<script type= "Text/javascript" >
onload = function () {
var a =
"23.456322";
var anew;
var re =/([0-9]+.[ 0-9]{2}) [0-9]*/;

anew = A.replace (Re, "$");
alert (anew);
}
</script>

Some other methods

<script>
var num=22.127456;
Alert
Math.Round (num*100)/100);
</script>

JS decimal Take Integer