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substring

files/en-us/web/xml/xpath/reference/functions/substring/index.md

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The substring function returns a part of a given string.

Syntax

plain
substring(string, start)
substring(string, start, length)

Parameters

  • string
    • : The string to evaluate.
  • start
    • : The position within string the substring begins
  • length {{optional_inline}}
    • : The length of the substring. If omitted, the returned string will contain every character from the start position to the end of string.

Return value

A string.

Description

As in other XPath functions, the position is not zero-based. The first character in the string has a position of 1, not 0.

Specifications

XPath 1.0 4.2

Gecko support

Supported.