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home | helpATOI(3) BSD Library Functions Manual ATOI(3) NAME 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
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | STANDARDS | CAVEATS