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Javascript Number - toPrecision()
Description:
This method returns a string representing the number object to the specified precision.
Syntax:
number.toPrecision( [ precision ] )
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Here is the detail of parameters:
Return Value:
Returns a string representing a Number object in fixed-point or exponential notation rounded to precision significant digits.
Example:
<html>
<head>
<title>JavaScript toPrecision() Method </title>
</head>
<body>
<script type="text/javascript">
var num = new Number(7.123456);
document.write("num.toPrecision() is " + num.toPrecision());
document.write("<br />");
document.write("num.toPrecision(4) is " + num.toPrecision(4));
document.write("<br />");
document.write("num.toPrecision(2) is " + num.toPrecision(2));
document.write("<br />");
document.write("num.toPrecision(1) is " + num.toPrecision(1));
</script>
</body>
</html>
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This will produce following result:
num.toPrecision() is 7.123456
num.toPrecision(4) is 7.123
num.toPrecision(2) is 7.1
num.toPrecision(1) is 7
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To understand it in better way you can Try it yourself.
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