ATOF(3)

NAME
atof, atof_l - convert ASCII string to double

LIBRARY
libc

SYNOPSIS
#include <stdlib.h>
double
atof(const char *nptr);
#include <xlocale.h>
double
atof_l(const char *nptr, locale_t loc);

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

It is equivalent to:

    strtod(nptr, NULL);

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

The _l-suffixed version takes an explicit locale argument, whereas the non-suffixed version use the current global or per-thread locale.

IMPLEMENTATION NOTES
The atof() function is not thread-safe and also not async-cancel-safe.

The atof() function has been deprecated by strtod() and should not be used 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 p1003.1-90, isoC, and isoC-99.