ATOI(3)                    Library Functions Manual                    ATOI(3)

NAME
     atoi, atoi_l – convert ASCII string to integer

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <stdlib.h>

     int
     atoi(const char *str);

     #include <xlocale.h>

     int
     atoi_l(const char *str, locale_t loc);

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

     It is equivalent to:

           (int)strtol(str, (char **)NULL, 10);

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

IMPLEMENTATION NOTES
     The atoi() and atoi_l() functions are thread-safe and async-cancel-safe.

     The strtol() and strtol_l() functions are recommended instead of atoi()
     and atoi_l() functions, especially in new code.

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

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

STANDARDS
     The atoi() function conforms to IEEE Std 1003.1-1990 (“POSIX.1”), ISO/IEC
     9899:1990 (“ISO C90”), and ISO/IEC 9899:1999 (“ISO C99”).

macOS 15.2                       June 4, 1993                       macOS 15.2