Mainframe, MVS and zOS Discussion

How can we delete a flat file in JCL? What utility should we use?

does
hint anything ?

Most programmers use IEFBR14 to prevent unexpected side effects.

Thanks. So can I use any program and just use DISP=(OLD,DELETE)?

That would depend on what you and why you are trying to delete. I would not use your bill writing program simply to clean up a few stray dtat sets - you do not want the bills except at bill production time. To simply delete datasets use, as has been suggested, IEFBR14 because it is a program that does nothing - it starts and it then ends. Nothing more. Your JCL statements are actioned by the operating system - not by the program.