ATOF(3)                  BSD Library Functions Manual                  ATOF(3)

NAME
     atof, atof_l -- convert ASCII string to double

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <stdlib.h>

     double
     atof(const char *str);

     #include <xlocale.h>

     double
     atof_l(const char *str, locale_t loc);

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

     It is equivalent to:

           strtod(str, (char **)NULL);

     The decimal point character is defined in the program's locale (category
     LC_NUMERIC).

     While the atof() function uses the current locale, the atof_l() function
     may be passed a locale directly. See xlocale(3) for more information.

IMPLEMENTATION NOTES
     The atof() and atof_l() functions are thread-safe and async-cancel-safe.

     The strtod() and strtod_l() functions are recommended instead of atof()
     and atof_l() functions, especially in new code.

ERRORS
     The function atof() need not affect the value of errno on an error.

SEE ALSO
     atoi(3), atol(3), strtod(3), strtol(3), strtoul(3), xlocale(3)

STANDARDS
     The atof() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1''),
     ISO/IEC 9899:1990 (``ISO C90''), and ISO/IEC 9899:1999 (``ISO C99'').

BSD                              June 4, 1993                              BSD