strtod

STRTOD(3)                      Library functions                     STRTOD(3)



NAME
       strtod - convert ASCII string to double

SYNOPSIS
       #include <stdlib.h>

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

DESCRIPTION
       The strtod() function converts the initial portion of the string
       pointed to by nptr to double representation.

       The expected form of the string is optional leading white space as
       checked by isspace(3), 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 non-empty sequence of digits.  If the locale is not "C" or
       "POSIX", different formats may be used.

RETURN VALUES
       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.

ERRORS
       ERANGE Overflow or underflow occurred.

CONFORMING TO
       ANSI C

SEE ALSO
       atof(3), atoi(3), atol(3), strtol(3), strtoul(3)



BSD Manual Page                 March 4th, 1996                      STRTOD(3)