Description:
This method returns the arctangent in radians of a number. The atan method returns a numeric value between -pi/2 and pi/2 radians.
Syntax:
Math.atan( x ) ; |
- x : A number.
Return Value:
Returns the arctangent in radians of a number.Example:
<html>
<head>
<title>JavaScript Math atan() Method</title>
</head>
<body>
<script type="text/javascript">
var value = Math.atan(-1);
document.write("First Test Value : " + value );
var value = Math.atan(.5);
document.write("<br />Second Test Value : " + value );
var value = Math.atan(30);
document.write("<br />Third Test Value : " + value );
var value = Math.atan("string");
document.write("<br />Fourth Test Value : " + value );
</script>
</body>
</html>
|
First Test Value : -0.7853981633974483 Second Test Value : 0.4636476090008061 Third Test Value : 1.5374753309166493 Fourth Test Value : NaN
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