%%SET

A %%SET control statement sets the values of user-defined variables. The statement may be placed in any part of the JCL stream.

The format of the statement is:

%%SET %%varname=expression

where:

• varname – a valid user-defined variable
• expression – must resolve to a value according to the rules described in Rules of Variable Resolution or submission of the job is canceled (unless a %%RESOLVE NO control statement is specified). An expression can consist of a:
  • value (for example, 5)
  • variable (for example, %%ODATE)
  • combination of values, variables, operators, functions, and so on (for example, %%GENERATION_NUMBER %%PLUS 1)

  The expression must not contain blanks.

Example 1

%%SET %%BACKUP_UNIT=TAPE

User-defined variable %%BACKUP_UNIT is assigned the value TAPE.

Example 2

%%SET %%BACKUP_UNIT_%%WDAY=EE%%OMONTH.%%ODAY

On Monday, 24th of September, user-defined variable %%BACKUP_UNIT_1 is assigned the value EE0924.

Example 3

//* %%SET %%SCRATCH=%%SCRATCH %%PLUS 1

//SYSUT1 DD UNIT=TAPE,VOL=SER=EE%%SCRATCH,DISP=...

When the initial value of SCRATCH is 3017, the result in the submitted member is:

//* %%SET %%SCRATCH=3017 %%PLUS 1

//SYSUT1 DD UNIT=TAPE,VOL=SER=EE3018,DISP=...