JCL is a programming language used on IBM mainframe operating systems. It is used to write programs that control the execution of other programs.
JCL is short for Job Control Language. It is a scripting language that tells the operating system what job to run and how to run it. It includes instructions for the operating system, the job, and the data sets.
JCL has three parts: the job control statements, the job execution statements, and the job termination statements.
The job control statements tell the operating system when to start and stop the job. They also tell the operating system what resources the job needs.
The job execution statements tell the operating system what to do with the job. They tell the operating system how to run the job and what to do with the job's output.
The job termination statements tell the operating system when to stop the job. They also tell the operating system what to do with the job's output.