how can i print A & B in echo message within Ant script

<target name="three"&开发者_JS百科gt;
<echo message="A & B"/>
</target> 

whenever i m running this code it shows the error like The entity name must immediately follow the '&' in the entity reference. how can i print A & B pls help me out guys

Use & instead of &

Ant scripts must be valid XML, so the ampersand needs XML-escaping:

<target name="three">
<echo message="A &amp; B"/>
</target>