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Detailed explanation of the use of Number.NEGATIVE_INFINITY value in JavaScript_Basic knowledge

WBOY
WBOYOriginal
2016-05-16 15:56:291396browse

This is a special value that represents a value less than Number.MIN_VALUE. This value is expressed as "negative infinity". This value is similar to infinity in its mathematical behavior. For example, anything multiplied by NEGATIVE_INFINITY is NEGATIVE_INFINITY, and anything divided by NEGATIVE_INFINITY is zero.

Because NEGATIVE_INFINITY is a constant, it is a read-only property of the number.
Grammar

You can access properties using the following syntax: 

var val = Number.NEGATIVE_INFINITY;

Example:

Here is an example illustrating the usage of this attribute: 

<html>
<head>
<script type="text/javascript">
<!--
function showValue()
{
  var smallNumber = (-Number.MAX_VALUE) * 2
  if (smallNumber == Number.NEGATIVE_INFINITY) {
   alert("Value of smallNumber : " + smallNumber );
  }
}
//-->
</script>
</head>
<body>
<p>Click the following to see the result:</p>
<form>
<input type="button" value="Click Me" onclick="showValue();" />
</form>
</body>
</html>

This will produce the following results: 

Value of val : -Infinity


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