<if>

An <if> element is used for simple conditional logic.

Syntax

<if cond="expression">

Attributes

cond

An expression to evaluate in conjunction with the test of the form item variable.

Children

<assign>, <audio>, <clear>, <disconnect>, <else>, <elseif>, <enumerate>, <exit>, <goto>, <if>, <log>, <prompt>, <reprompt>, <return>, <script>, <submit>, <throw>, <value>, and <var>.

Parents

<block>, <catch>, <error>, <filled>, <help>, <if>, <noinput>, <nomatch>, and <prompt>,

Variables

none

Example

The following example illustrates if condition logic.

<if cond="total > 1000"> 
  <prompt>This is way too much to spend.</prompt> 
  <throw event="com.xyzcorp.acct.toomuchspent"/> 
</if> 

<if cond="amount < 29.95"> 
  <assign name="x" expr="amount"/> 
<else/> 
  <assign name="x" expr="29.95"/> 
</if> 

<if cond="flavor == 'vanilla'"> 
  <assign name="flavor_code" expr="'v'"/> 
<elseif cond="flavor == 'chocolate'"/> 
  <assign name="flavor_code" expr="'h'"/> 
<elseif cond="flavor == 'strawberry'"/> 
  <assign name="flavor_code" expr="'b'"/> 
<else/> 
  <assign name="flavor_code" expr="'?'"/> 
</if>

Version Information

Supported in: VoiceXML 1.0, VoiceXML 2.0, and VoiceXML 2.1.