<if>

Description

The <if> element is a conditional logic statement that is used with the optional <elseif> and <else> elements. It is used to define content to be executed in a specific condition.

Syntax


<if
    cond="ECMAScript_Expression">
  child elements
</if>

Attributes

Attribute	Description
cond	An ECMAScript expression to be evaluated and used as a boolean value for this conditional logic statement. Required.

Parents

Children

<assign>, <audio>, <clear>, <data>, <disconnect>, <else>, <elseif>, <enumerate>, <exit>, <foreach>, <goto>, <if>, <log>, <prompt>, <reprompt>, <return>, <script>, <submit>, <throw>, <value>, <var>, #PCDATA

Extensions

None.

Limitations/Restrictions

<if> cannot be used as a child of <foreach> when <foreach> is a child of <prompt>.

Example


<?xml version="1.0"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">
  <form>
    <var name="number_var" expr="5"/>
    <var name="boolean_var" expr="true"/>
    <var name="string_var" expr="'hello'"/>
    <block>
      <if cond="number_var != 5">
        The number is not five.
      <elseif cond="!boolean_var"/>
        The boolean is not true.
      <elseif cond="string_var != 'hello'"/>
        The string is not hello.
      <else/>
        The number is five and
        the boolean is true and
        the string is hello.
      </if>
    </block>
  </form>
</vxml>