<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 <stdlib.h>
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.
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<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>,
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<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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