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</pre>
Evidently, the variables namesnamed in the NAMELIST are written out, one to a line in free-format with a style appropriate to its type, much as if they were assignment statements within a source file. The namelist's name starts the output, and the block of values ends with a line starting with a slash. On input, blocks will be skipped until the correct block name is found, so a single file may contain parameters for multiple usages. All output starts with column two so that column one can be used as a carriage control character if output is to go to a lineprinter. There is special provision for an array's value list whereby a run of equal values can be noted via <code>''n''*''value''</code> to save space, further, an input statement for an array can name a single element (the others being unaffected), and with F90, the usual array span facilities are available as in <code>A(6:10) = 5*3.14</code>
The names may appear in any order, and names can be omitted - if so, the corresponding variable will be unaffected by a READ. This file could of course be edited before being read back in. F90 introduces the ! character as an "escape" comment and this is recognised in the NAMELIST input, outside of text literals of course.
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