Factor 1 names a field or gives actual data (literals) or RPG/400 special words (*NAMVAR DEFN) on which an operation is to be done. The entry must begin in position 18. The entries that are valid for factor 1 depend on the operation code specified in positions 28 through 32. For the specific entries for factor 1 for a particular operation code, see Operation Codes. With some operation codes, a colon can be used to separate parts of the factor, but must be preceded by and followed by a valid entry.
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