Ampersand, percent, compound, and question mark variables
The three variable types, ampersand (&), percent sign (%), and question mark (?), cause HCL Workload Automation for Z to perform variable substitution in different ways. You can use a variable multiple times with a different prefix symbol within the same job.
Note: If
JCL variable substitution is on, the ampersand (&), percent sign
(%), and question mark (?) are considered by HCL Workload Automation for Z as
symbols that precede a JCL variable. Therefore, if you want to use
these variables as comment characters within a JCL procedure, specify
ACTION=NOSCAN to prevent the JCL from ending with errors.