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Strtod

 <TITLE>strtod</TITLE>
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<h3>STRTOD(3)           Linux Programmer's Manual           STRTOD(3)
</h3>

<h3>NAME
</h3>       strtod - convert ASCII string to double

<h3>SYNOPSIS
</h3>       #include &lt;stdlib.h&gt;

       double strtod(const char *nptr, char **endptr

<h3>DESCRIPTION
</h3>       The  strtod  function  converts the initial portion of the
       string pointed to by nptr to double representation.

       The expected form  of  the  string  is  an  optional  plus
       (``+'')  or  minus  sign (``-'') followed by a sequence of
       digits optionally containing  a  decimal-point  character,
       optionally  followed by an exponent.  An exponent consists
       of an ``E'' or ``e'', followed  by  an  optional  plus  or
       minus sign, followed by a sequence of digits.

       Leading  white-space  characters in the string (as defined
       by the isspace(3) function) are skipped.

<h3>RETURN VALUES
</h3>       The strtod function returns the converted value, if any.

       If endptr is not NULL, a pointer to  the  character  after
       the last character used in the conversion is stored in the
       location referenced by endptr.

       If no conversion is performed, zero is  returned  and  the
       value  of  nptr  is  stored  in the location referenced by
       endptr.

       If the correct value would cause overflow, plus  or  minus
       HUGE_VAL is returned (according to the sign of the value),
       and ERANGE is stored in errno.  If the correct value would
       cause  underflow, zero is returned and ERANGE is stored in
       errno.

<h3>ERRORS
</h3>       ERANGE Overflow or underflow occurred.

</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=atof.htm>atof</a>, 
<a href=atoi.htm>atoi</a>, 
<a href=atol.htm>atol</a>, 
<a href=strtol.htm>strtol</a>, 
<a href=strtoul.htm>strtoul</a>, 
<pre>

<h3>STANDARDS
</h3>       The strtod function conforms to ANSI-C.

<h3>BUGS
</h3>       This is a BSD manual page and may not reflect the  current
       Linux implementation.






<h3>BSD Man Page               21 Aug 1994                          1
</h3>


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