Ant is great build tool due to following reason:
Ant is a Java-based build tool designed to be cross-platform, easy to use, extensible, and scalable.
Ant can be used in a small personal project as well as ant can be used in a large, multi-team software project.
Ant syntax is very easy to learn.
Ant syntax used XML format .We need only specifies our task only on build.xml file.
Ant is easy to use .eliminating the full-time make file engineer common on large Make-based software projects.