Differences between edit, CLIST, and REXX assignment statements

Edit assignment statements are preceded by ISREDIT. CLIST assignment statements are preceded by SET. If the ADDRESS ISREDIT command is in effect, edit assignment statements within a REXX exec do not need to be preceded by ISREDIT.
In edit assignment statements, a keyphrase must appear on either the left or right side of the equal sign. A keyphrase is either a single keyword, or a keyword followed by a line number or label. See Keyphrase if you need more information.
When coding edit assignment statements, variable names to be passed to the editor are enclosed in parentheses so that the PDF component is passed the name of the variable, not its value. Sometimes two variable names may appear within the parentheses.
Arithmetic expressions are not allowed in an edit assignment statement, but in certain cases a plus sign (+) can be used to show partial overlay of a line. See Overlays and templates if you need more information.