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atoi(3) [netbsd man page]

ATOI(3) 						   BSD Library Functions Manual 						   ATOI(3)

atoi -- convert ASCII string to integer LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <stdlib.h> int atoi(const char *nptr); DESCRIPTION
The atoi() function converts the initial portion of the string pointed to by nptr to integer representation. It is equivalent to: (int)strtol(nptr, (char **)NULL, 10); SEE ALSO
atof(3), atol(3), strtod(3), strtol(3), strtoul(3) STANDARDS
The atoi() function conforms to ANSI X3.159-1989 (``ANSI C89''). CAVEATS
atoi does no overflow checking, handles unsigned numbers poorly, and handles strings containing trailing extra characters (like ``123abc'') poorly. Careful use of strtol(3) and strtoul(3) can alleviate these problems. BSD
June 4, 1993 BSD

Check Out this Related Man Page

ATOI(3) 						     Linux Programmer's Manual							   ATOI(3)

atoi, atol, atoll, atoq - convert a string to an integer. SYNOPSIS
#include <stdlib.h> int atoi(const char *nptr); long atol(const char *nptr); long long atoll(const char *nptr); long long atoq(const char *nptr); DESCRIPTION
The atoi() function converts the initial portion of the string pointed to by nptr to int. The behaviour is the same as strtol(nptr, (char **)NULL, 10); except that atoi() does not detect errors. The atol() and atoll() functions behave the same as atoi(), except that they convert the initial portion of the string to their return type of long or long long. atoq() is an obsolete name for atoll(). RETURN VALUE
The converted value. CONFORMING TO
SVID 3, POSIX.1, BSD 4.3, ISO/IEC 9899. ISO/IEC 9899:1990 (C89) and POSIX.1 (1996 edition) include the functions atoi() and atol() only; C99 adds the function atoll(). NOTES
The non-standard atoq() function is not present in libc 4.6.27 or glibc 2, but is present in libc5 and libc 4.7 (though only as an inline function in <stdlib.h> until libc 5.4.44). The atoll() function is present in glibc 2 since version 2.0.2, but not in libc4 or libc5. SEE ALSO
atof(3), strtod(3), strtol(3), strtoul(3) GNU
2000-12-17 ATOI(3)
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