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<hr>
<a name="ICHAR-_002d_002d_002d-Character_002dto_002dinteger-conversion-function"></a>
<h3 class="section">9.142 <code>ICHAR</code> &mdash; Character-to-integer conversion function</h3>
<a name="index-ICHAR"></a>
<a name="index-conversion_002c-to-integer-2"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p><code>ICHAR(C)</code> returns the code for the character in the first character
position of <code>C</code> in the system&rsquo;s native character set.
The correspondence between characters and their codes is not necessarily
the same across different GNU Fortran implementations.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>Fortran 95 and later, with <var>KIND</var> argument Fortran 2003 and later
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Elemental function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><p><code>RESULT = ICHAR(C [, KIND])</code>
</p>
</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>C</var></td><td width="70%">Shall be a scalar <code>CHARACTER</code>, with <code>INTENT(IN)</code></td></tr>
<tr><td width="15%"><var>KIND</var></td><td width="70%">(Optional) An <code>INTEGER</code> initialization
expression indicating the kind parameter of the result.</td></tr>
</table>

</dd>
<dt><em>Return value</em>:</dt>
<dd><p>The return value is of type <code>INTEGER</code> and of kind <var>KIND</var>. If
<var>KIND</var> is absent, the return value is of default integer kind.
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><div class="smallexample">
<pre class="smallexample">program test_ichar
  integer i
  i = ichar(' ')
end program test_ichar
</pre></div>

</dd>
<dt><em>Specific names</em>:</dt>
<dd><table>
<tr><td width="20%">Name</td><td width="20%">Argument</td><td width="20%">Return type</td><td width="25%">Standard</td></tr>
<tr><td width="20%"><code>ICHAR(C)</code></td><td width="20%"><code>CHARACTER C</code></td><td width="20%"><code>INTEGER(4)</code></td><td width="25%">Fortran 77 and later</td></tr>
</table>

</dd>
<dt><em>Note</em>:</dt>
<dd><p>No intrinsic exists to convert between a numeric value and a formatted
character string representation &ndash; for instance, given the
<code>CHARACTER</code> value <code>'154'</code>, obtaining an <code>INTEGER</code> or
<code>REAL</code> value with the value 154, or vice versa. Instead, this
functionality is provided by internal-file I/O, as in the following
example:
</p><div class="smallexample">
<pre class="smallexample">program read_val
  integer value
  character(len=10) string, string2
  string = '154'
  
  ! Convert a string to a numeric value
  read (string,'(I10)') value
  print *, value
  
  ! Convert a value to a formatted string
  write (string2,'(I10)') value
  print *, string2
end program read_val
</pre></div>

</dd>
<dt><em>See also</em>:</dt>
<dd><p><a href="ACHAR.html#ACHAR">ACHAR</a>, <a href="CHAR.html#CHAR">CHAR</a>, <a href="IACHAR.html#IACHAR">IACHAR</a>
</p>
</dd>
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