Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Language Reference Manual

Prefix operators and arrays

The operation of a prefix operator on an array produces an array of identical bounds. Each element of this array is the result of the operation performed on each element of the original array. For example:

  If A is the array      5   3  -9
                         1   2   7
                         6   3  -4
 
  then -A is the array  -5  -3   9
                        -1  -2  -7
                        -6  -3   4

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