The easiest way to learn JCL is to use some that's already been written, which is why we started the reusable JCL collection. If you need to complete tasks that are not yet represented in the reusable collection, you can borrow someone else's JCL and modify it to suit your task. Before you start modifying or coding your own JCL, use this course to learn about general syntax rules and the three major JCL statements.