The sign condition determines whether or not the algebraic value of a numeric operand is greater than, less than, or equal to zero.
Sign Condition - Format
>>-operand-1--+----+--+-----+--+-POSITIVE-+--------------------><
'-IS-' '-NOT-' +-NEGATIVE-+
'-ZERO-----'
+-------------------------------IBM Extension--------------------------------+
The operand can be defined as a floating-point identifier.
+----------------------------End of IBM Extension----------------------------+
An unsigned operand is either POSITIVE or ZERO.
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