### 11.2.3.3 O Editing

The O data edit descriptor transfers octal (base 8) values. It takes the following form:

  Ow[.m]

The value of m (the minimum number of digits in the constant) must not exceed the value of w (the field width). The m has no effect on input, only output.

The specified I/O list item can be of type integer, real, or logical.

Rules for Input Processing

On input, the O data edit descriptor transfers w characters from an external field and assigns their octal value to the corresponding I/O list item. The external field must contain only octal digits (0 through 7) or blanks.

If the value exceeds the range of the corresponding input list item, an error occurs.

The following shows input using the O edit descriptor (the symbol ^ represents a nonprinting blank character):

    Format    Input         Value
    O5        32767               32767
    O4        16234                1623
    O3        97^           An error; the 9 is invalid in octal notation

Rules for Output Processing

On output, the O data edit descriptor transfers the octal value of the corresponding I/O list item, right-justified, to an external field that is w characters long.

The field consists of zero or more blanks, followed by an unsigned integer constant (consisting of octal digits) with no leading zeros. A negative value is transferred in internal form without a leading minus sign.

If m is specified, the unsigned integer constant must have at least m digits. If necessary, it is padded with leading zeros.

If m is zero, and the output list item has the value zero, the external field is filled with blanks.

The following shows output using the O edit descriptor (the symbol ^ represents a nonprinting blank character):

    Format     Value         Output
    O6          32767        ^77777
    O12        -32767        ^37777700001
    O2          14261        **
    O4             27        ^^33
    O5           10.5        41050
    O4.2            7        ^^07
    O4.4            7        0007

For More Information:

- On the form for data edit descriptors, see Section 11.2.1.
- On general rules for numeric editing, see Section 11.2.2.

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