OPTION BASE              Set Minimum Array Subscript

 OPTION BASE n

    Specifies whether the lowest subscript in all arrays used in a program
    is 0 or 1.

           n    Must be 0 or 1. The default is 0.

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      Notes:    The OPTION BASE statement, if used, must be executed
                before any arrays are defined or used. Only one OPTION
                BASE statement per compilation is allowed.