atoi(3) - f33

1ATOI(3)                    Linux Programmer's Manual                   ATOI(3)
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NAME

6       atoi, atol, atoll - convert a string to an integer
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SYNOPSIS

9       #include <stdlib.h>
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11       int atoi(const char *nptr);
12       long atol(const char *nptr);
13       long long atoll(const char *nptr);
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15   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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17       atoll():
18           _ISOC99_SOURCE ||
19               || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
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DESCRIPTION

22       The  atoi() function converts the initial portion of the string pointed
23       to by nptr to int.  The behavior is the same as
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25           strtol(nptr, NULL, 10);
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27       except that atoi() does not detect errors.
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29       The atol() and atoll() functions behave the same as atoi(), except that
30       they  convert the initial portion of the string to their return type of
31       long or long long.
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RETURN VALUE

34       The converted value.
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ATTRIBUTES

37       For  an  explanation  of  the  terms  used   in   this   section,   see
38       attributes(7).
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40       ┌────────────────────────┬───────────────┬────────────────┐
41       │Interface               │ Attribute     │ Value          │
42       ├────────────────────────┼───────────────┼────────────────┤
43       │atoi(), atol(), atoll() │ Thread safety │ MT-Safe locale │
44       └────────────────────────┴───────────────┴────────────────┘

CONFORMING TO

46       POSIX.1-2001,  POSIX.1-2008,  C99,  SVr4, 4.3BSD.  C89 and POSIX.1-1996
47       include the functions atoi() and atol() only.
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COLOPHON

53       This page is part of release 5.07 of the Linux  man-pages  project.   A
54       description  of  the project, information about reporting bugs, and the
55       latest    version    of    this    page,    can     be     found     at
56       https://www.kernel.org/doc/man-pages/.
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60GNU                               2020-04-11                           ATOI(3)