I am trying to figure out which Apache Ant version is running on the Jenkins server. Starting from Apache Ant 1.7.0, you can make use of the <Antversion> task to determine the running Ant version. The following is a simple build.xml which could serve this purpose.

<project name="ant-antversion-example" default="run" basedir=".">
  <target name="run">
    <echo message="Checking ANT version ..."/>
    <antversion property="antversion"/>
    <echo message="  version: ${antversion}"/>
  </target>
</project>

Try it out.

 

Done =)

Reference Apache Ant – <Antversion>