NAME

atoi - convert ASCII string to integer

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS



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.