====== < assign > ======

===== Description =====

The <assign> element assigns a value to a variable.  It is illegal to make an assignment to a variable that has not been explicitly declared using a <var> element or a <var> statement within a <script>. Attempting to assign an undeclared variable causes an error.semantic event to be thrown.
===== Syntax =====

<code>
<assign
name="string"
expr="ECMAScript_Expression"/>
</code>

===== Attributes =====

|name|The name of the variable being assigned to. This is required.|
|expr|The value to assign to the variable. This is required.|

In the expr content you can escape special characters (with "\") : "Bonjour, je suis l\'assistant téléphonique... '".

===== Parents =====

<code>
<block>, <catch>, <error>, <filled>, <help>, <if>, <noinput>, <nomatch>
</code>

===== Children =====

<code>
None.
</code>

===== Extensions =====

<code>
None.
</code>

===== Limitations/Restrictions =====

<code>
None.
</code>

===== Example Code =====

<code>
<?xml version="1.0"?>
<vxml version="2.0" xmlns="http://www.w3.org/2001/vxml">
 <var name="tree" expr="'an apple tree'"/>
 <form>
  <block>
   <prompt> The initial value is <value expr="tree"/> </prompt>
   <assign name="tree" expr="'apple orchards'"/>
   <prompt> The new value is <value expr="tree"/> </prompt>
  </block>
 </form>
</vxml>
</code>