# ascii

## NAME



           ascii - ASCII character set encoded in octal, decimal, and
           hexadecimal
    


## DESCRIPTION



           ASCII is the American Standard Code for Information Interchange.
           It is a 7-bit code.  Many 8-bit codes (e.g., ISO/IEC 8859-1)
           contain ASCII as their lower half.  The international counterpart
           of ASCII is known as ISO/IEC 646-IRV.
    
           The following table contains the 128 ASCII characters.
    
           C program '\X' escapes are noted.
    
           Oct   Dec   Hex   Char                        Oct   Dec   Hex   Char
           ────────────────────────────────────────────────────────────────────────
           000   0     00    NUL '\0' (null character)   100   64    40    @
           001   1     01    SOH (start of heading)      101   65    41    A
           002   2     02    STX (start of text)         102   66    42    B
           003   3     03    ETX (end of text)           103   67    43    C
           004   4     04    EOT (end of transmission)   104   68    44    D
           005   5     05    ENQ (enquiry)               105   69    45    E
           006   6     06    ACK (acknowledge)           106   70    46    F
           007   7     07    BEL '\a' (bell)             107   71    47    G
           010   8     08    BS  '\b' (backspace)        110   72    48    H
           011   9     09    HT  '\t' (horizontal tab)   111   73    49    I
           012   10    0A    LF  '\n' (new line)         112   74    4A    J
           013   11    0B    VT  '\v' (vertical tab)     113   75    4B    K
           014   12    0C    FF  '\f' (form feed)        114   76    4C    L
           015   13    0D    CR  '\r' (carriage ret)     115   77    4D    M
           016   14    0E    SO  (shift out)             116   78    4E    N
           017   15    0F    SI  (shift in)              117   79    4F    O
           020   16    10    DLE (data link escape)      120   80    50    P
           021   17    11    DC1 (device control 1)      121   81    51    Q
           022   18    12    DC2 (device control 2)      122   82    52    R
           023   19    13    DC3 (device control 3)      123   83    53    S
           024   20    14    DC4 (device control 4)      124   84    54    T
           025   21    15    NAK (negative ack.)         125   85    55    U
           026   22    16    SYN (synchronous idle)      126   86    56    V
           027   23    17    ETB (end of trans. blk)     127   87    57    W
           030   24    18    CAN (cancel)                130   88    58    X
           031   25    19    EM  (end of medium)         131   89    59    Y
           032   26    1A    SUB (substitute)            132   90    5A    Z
           033   27    1B    ESC (escape)                133   91    5B    [
           034   28    1C    FS  (file separator)        134   92    5C    \  '\\'
           035   29    1D    GS  (group separator)       135   93    5D    ]
           036   30    1E    RS  (record separator)      136   94    5E    ^
           037   31    1F    US  (unit separator)        137   95    5F    _
           040   32    20    SPACE                       140   96    60    `
           041   33    21    !                           141   97    61    a
           042   34    22    "                           142   98    62    b
           043   35    23    #                           143   99    63    c
           044   36    24    $                           144   100   64    d
           045   37    25    %                           145   101   65    e
           046   38    26    &                           146   102   66    f
           047   39    27    '                           147   103   67    g
           050   40    28    (                           150   104   68    h
           051   41    29    )                           151   105   69    i
           052   42    2A    *                           152   106   6A    j
           053   43    2B    +                           153   107   6B    k
           054   44    2C    ,                           154   108   6C    l
           055   45    2D    -                           155   109   6D    m
           056   46    2E    .                           156   110   6E    n
           057   47    2F    /                           157   111   6F    o
           060   48    30    0                           160   112   70    p
           061   49    31    1                           161   113   71    q
           062   50    32    2                           162   114   72    r
           063   51    33    3                           163   115   73    s
           064   52    34    4                           164   116   74    t
           065   53    35    5                           165   117   75    u
           066   54    36    6                           166   118   76    v
           067   55    37    7                           167   119   77    w
           070   56    38    8                           170   120   78    x
           071   57    39    9                           171   121   79    y
           072   58    3A    :                           172   122   7A    z
           073   59    3B    ;                           173   123   7B    {
           074   60    3C    <                           174   124   7C    |
           075   61    3D    =                           175   125   7D    }
           076   62    3E    >                           176   126   7E    ~
           077   63    3F    ?                         │ 177   127   7F    DEL
                                                       │
       **Tables** │
           For convenience, below are more compact tables in hex and decimal.
    
              2 3 4 5 6 7       30 40 50 60 70 80 90 100 110 120
            -------------      ---------------------------------
           0:   0 @ P ` p     0:    (  2  <  F  P  Z  d   n   x
           1: ! 1 A Q a q     1:    )  3  =  G  Q  [  e   o   y
           2: " 2 B R b r     2:    *  4  >  H  R  \  f   p   z
           3: # 3 C S c s     3: !  +  5  ?  I  S  ]  g   q   {
           4: $ 4 D T d t     4: "  ,  6  @  J  T  ^  h   r   |
           5: % 5 E U e u     5: #  -  7  A  K  U  _  i   s   }
           6: & 6 F V f v     6: $  .  8  B  L  V  `  j   t   ~
           7: ' 7 G W g w     7: %  /  9  C  M  W  a  k   u  DEL
           8: ( 8 H X h x     8: &  0  :  D  N  X  b  l   v
           9: ) 9 I Y i y     9: '  1  ;  E  O  Y  c  m   w
           A: * : J Z j z
           B: + ; K [ k {
           C: , < L \ l |
           D: - = M ] m }
           E: . > N ^ n ~
           F: / ? O _ o DEL
    


## NOTES



       **History**
           /etc/ascii (VII) appears in the UNIX Programmer's Manual.
    
           On older terminals, the underscore code is displayed as a left
           arrow, called backarrow, the caret is displayed as an up-arrow and
           the vertical bar has a hole in the middle.
    
           Uppercase and lowercase characters differ by just one bit and the
           ASCII character 2 differs from the double quote by just one bit,
           too.  That made it much easier to encode characters mechanically
           or with a non-microcontroller-based electronic keyboard and that
           pairing was found on old teletypes.
    
           The ASCII standard was published by the United States of America
           Standards Institute (USASI) in 1968.
    


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