Usually, there is not enough room remaining on the statement for a meaningful comment. Most programmers code JCL comment statements instead. The remainder of the statement is treated as a comment. The first statement in your job must be a JOB statement. It must begin in column 3 and conform to the standard OS naming convention.
Most installations impose rigid restrictions on job names.
Its format is installation-dependent. It may contain subparameters separated by commas. If so, the entire field must be enclosed in parenthesis. They are identified by a keyword and an equal sign. While there are several acceptable formats, coding minutes,seconds inside parenthesis is generally used.