format-number
The format-number function evaluates a number and returns a string representing the number in a given format.
Syntax
format-number(number, pattern) format-number(number, pattern, decimalFormat)
Parameters
number- 
The number to be formatted
 pattern- 
A string in the format of the Java DecimalFormat class.
 decimalFormat(optional)- 
The name of an
xsl:decimal-formatelement that defines the number format to be used. If omitted, the default decimal-format will be used. 
Return value
A string representing the number in the new format.
Description
This function is an XSLT-specific addition to XPath. It is not a part of the core XPath function library.
Specifications
Gecko support
Supported.