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copied!<p>List-directed output is processor-specific (note that Fortran standard calls "processor" what we'd normally refer to as "compiler"). Here is what the Fortran 90 standard says about list-directed output:</p> <blockquote> <p>10.8.2 List-directed output</p> <p>...</p> <p>Integer output constants are produced with the effect of an <code>Iw</code> edit descriptor.</p> <p>Real constants are produced with the effect of either an <code>F</code> edit descriptor or an <code>E</code> edit descriptor, depending on the magnitude <code>x</code> of the value and a range 10<sup>d1</sup> <= <code>x</code> < 10<sup>d2</sup>, where <code>d1</code> and <code>d2</code> are processor-dependent integers. If the magnitude <code>x</code> is within this range, the constant is produced using <code>0PFw.d</code>; otherwise, <code>1PEw.dEe</code> is used.</p> <p>For numeric output, <em>reasonable processor-dependent values</em> of <code>w</code>, <code>d</code>, and <code>e</code> are used for each of the numeric constants output.</p> </blockquote> <p>(emphasis mine)</p> <p>The same rules are used for numerical values. The text in §10.10.4 of the Fortran 2008 standard copies that from the Fortran 90 standard so no changes in list-directed output were introduced.</p> <p>As noted already by M. S. B., you can use the <code>I0</code> edit descriptor to print integer values with the least amount of space necessary:</p> <pre><code>! Note the space in the string PRINT '("The difference is ",I0)', diff </code></pre>

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