Question: how to create jcl in mainframe?
Answer: Allocate a data set to contain your JCL. Use ISPF (or equivalent function) to allocate a data set named. ...  Edit the JCL data set and add the necessary JCL. ...  Submit the JCL to the system as a job. ...  View and understand the output from the job. ...  Make changes to your JCL. ...  View and understand your final output.