### 8.3.1.2 O Field Descriptor

The O field descriptor transfers octal (base 8) values and can be used with any data type. It takes the following form:

    Ow[.m]

Input Processing

In an input statement, the O field descriptor transfers w characters from the external field and assigns them as an octal value to the corresponding I/O list element. The external field can contain only the numerals 0 through 7. It cannot contain a sign, a decimal point, or an exponent field.

An all-blank field is treated as a value of zero. An error occurs if the value of the external field exceeds the range of the corresponding list element.

The following list illustrates valid input processing using the O field descriptor (the symbol ^ represents a nonprinting space character):

    Format    External Field       Internal Octal Value

    O5        32767                      32767

    O4        16234                       1623

    O3        97^                  An error; the 9 is invalid in octal notation

Output Processing

In an output statement, the O field descriptor transfers the octal value of the corresponding I/O list element, right-justified, to an external field that is w characters long. No signs are transmitted; a negative value is transmitted in internal form.

If the value does not fill the field, leading spaces are inserted; if the value is too large for the field, the entire field is filled with asterisks. If m is present, the external field consists of at least m digits and is zero-filled on the left if necessary.

If m is zero and the external representation is zero, the external field is filled with blanks.

The following list illustrates valid output processing using O field descriptors (the symbol ^ represents a nonprinting space character):

    Format     Internal (Decimal) Value       External Representation

    O6          32767                         ^77777

    O12        -32767                         ^37777700001

    O2          14261                         **

    O4             27                         ^^33

    O5           10.5                         41050

    O4.2            7                         ^^07

    O4.4            7                         0007

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