PGI Fortran Reference manual - The Portland Group

Input and Output‣ Complex constants are contained within parentheses with the real and imaginary partsseparated by a comma.‣ Character constants are not delimited by apostrophes and have each internal apostrophe (ifany are present) represented externally by one apostrophe.‣ Each output record begins with a blank character to provide carriage control when the recordis printed.‣ A typeless value output with list-directed I/O is output in hexadecimal form by default. Thereis no other octal or hexadecimal capability with list-directed I/O.5.7.3. Commas in External FieldUse of the comma in an external field eliminates the need to "count spaces" to have data matchformat edit descriptors. The use of a comma to terminate an input field and thus avoid paddingthe field is fully supported.5.7.4. Character Encoding FormatUsers can specify input/output encoding using the encoding= specifier on the OPENstatement. Further, the use of this specifier with the INQUIRE statement returns the encoding ofthe file:UTF-8 specifies the file is connected for UTF-8 I/O or that the processor can detect thisformat in some way.UNKNOWN specifies the processor cannot detect the format.A processor-dependent value indicates the file is in another known format, such asUTF-16LE.5.8. Namelist GroupsThe NAMELIST statement allows for the definition of namelist groups. A namelist group allowsfor a special type of formatted input/output, where data is transferred between a named group ofdata items defined in a NAMELIST statement and one or more records in a file.The general form of a namelist statement is:NAMELIST /group-name/ namelist [[,] /group-name/ namelist ]...where:group-nameis the name of the namelist group.namelistis the list of variables in the namelist group.5.8.1. Namelist InputNamelist input is accomplished using a READ statement by specifying a namelist group as theinput item. The following statement shows the format:READ ([unit=] u, [NML=] namelist-group [,control-information])One or more records are processed which define the input for items in the namelist group.PGI Fortran Reference Guide 86