index.md

---

title: format-number
slug: Web/XPath/Functions/format-number

---

{{ XsltRef() }}

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-format element 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.

Notes

This function is an XSLT-specific addition to XPath. It is not a part of the core XPath function library.

Defined

XSLT 1.0 12.3

Gecko support

Supported.