Description

The toPrecision() method is used to format a number to a specified length.

A decimal point and nulls are added (if needed), to create the specified length.

This method has the form:

number.toPrecision(x)

Parameter	Description
x	(optional) The number of digits. If omitted, it returns the entire number (without any formatting)

Note: This method does not change the existing strings, it only returns a copy of the joined strings.

Examples

The following example shows the basic use of this method.

<script>
var num = new Number(123.45);
document.write(num.toPrecision());
</script>

This produces the following result:

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