You can use integers in any expression, including expressions in
    operands and in direct assignment statements.
    FORMAT
    snn

 s

    An optional sign: plus sign (+)  for positive numbers (the
    default), or minus sign (-) for negative numbers.

 nn

    A string of numeric characters that is legal for the specified
    radix.

    MACRO-64 interprets all integers in the source program as decimal
    unless the number is preceded by a radix control operator.

    Integers must be in the range of -263 to +263 -1 for signed data

    or in the range of 0 to 264 -1 for unsigned data.

    Negative numbers must be preceded by a minus sign; MACRO-64
    translates such numbers into two's complement form. In positive
    numbers, the plus sign is optional.