What is IEFBR14?

What is IEFBR14?

IEFBR14 is a null program. It's purpose is do nothing, just ext a program or a procedure.
It's used for syntax check of JCL since it does nothing.

Use of IEFBR14 -

//MYJOB   JOB  (,,,)
//STEP_1  EXEC PGM=IEFBR14
..
..