Specifies a variable to hold a value that is incremented each
    time the FOR loop is executed. The variable is decremented if the
    REVERSE keyword is specified. The starting value for the variable
    is the first value expression. Execution of the FOR loop ends
    when the variable has been incremented (or decremented) to the
    value specified with the second value expression.

    Marks the end of a FOR loop. If you choose to include the
    optional ending label, it must match exactly its corresponding
    beginning label. An ending label must be unique within the
    procedure in which the label is contained. The optional end-label
    argument makes the FOR loops of multistatement procedures easier
    to read, especially in very complex procedure blocks.