Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Programming Guide


Comparing national and other character-string operands

You can compare the character value of a national literal or class national data item with the character value of any of the following other character-string operands: alphabetic, alphanumeric, alphanumeric-edited, DBCS, or numeric-edited of USAGE DISPLAY.

These operands are treated as if they were moved to an elementary national data item. The characters are converted to national (UTF-16) representation, and the comparison proceeds with two national character operands.

related references  
National comparisons (Enterprise COBOL Language Reference)


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