英 [?bz]

abbr.acrylonitrile-butadiene-styrene ???????-????-???;?? ??;?? ??;??(ent)??

?????? ABS() ??? ???

??: ??? ???? ?????.

??: ??Math.abs(x)
????: x ??. ?? ???? ???.?

Return: x? ???.

?????? ABS() ??? ?

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script type="text/javascript">
//取得正數(shù)和負(fù)數(shù)的絕對(duì)值
    document.write(Math.abs(7.25) + "<br />")
    document.write(Math.abs(-7.25) + "<br />")
    document.write(Math.abs(7.25-10))

</script>

</body>
</html>

???? ?? ?

??? ????? ??? "???? ??" ??? ?????