SYNOPSIS
    int atoi (string str)

DESCRIPTION
    Convert a <str>ing into the number it describes and returns it.
    If the passed string can't be parsed into a number, the function
    will return "<not a number>" instead of an integer.

    The function recognizes the numbers "zero" through "twenty" and
    of course any digital representation ("69" et al).

EXAMPLE
    atoi("42") --> 42

SEE ALSO
    atoo(SEFUN), itoa(SEFUN), otoa(SEFUN)