When using ascii codes in a character string, "\n" and "\t" denote ascii newline and tab characters, respectively, "\\" denotes a backslash, and "\"" represents a quote within a string. Some other C escape sequences are allowed but are not supported. Arbitrary ascii codes may be included by "\nnn" where nnn is a 3-digit number in octal notation (e.g. "\012" is the same as "\n"). For a list of ascii characters, see help(ascii). The ascii codes are listed below.
cat("\tGreetings,\n",
"\011\145\141\162\164\150\154\151\156\147\041\012")
Ascii codes
000 nul | 001 soh | 002 stx | 003 etx
004 eot | 005 enq | 006 ack | 007 bel
010 bs | 011 ht | 012 nl | 013 vt
014 np | 015 cr | 016 so | 017 si
020 dle | 021 dc1 | 022 dc2 | 023 dc3
024 dc4 | 025 nak | 026 syn | 027 etb
030 can | 031 em | 032 sub | 033 esc
034 fs | 035 gs | 036 rs | 037 us
040 sp | 041 ! | 042 " | 043 #
044 $ | 045 % | 046 & | 047 '
050 ( | 051 ) | 052 * | 053 +
054 , | 055 - | 056 . | 057 /
060 0 | 061 1 | 062 2 | 063 3
064 4 | 065 5 | 066 6 | 067 7
070 8 | 071 9 | 072 : | 073 ;
074 < | 075 = | 076 > | 077 ?
100 @ | 101 A | 102 B | 103 C
104 D | 105 E | 106 F | 107 G
110 H | 111 I | 112 J | 113 K
114 L | 115 M | 116 N | 117 O
120 P | 121 Q | 122 R | 123 S
124 T | 125 U | 126 V | 127 W
130 X | 131 Y | 132 Z | 133 [
134 \ | 135 ] | 136 ^ | 137 _
140 ` | 141 a | 142 b | 143 c
144 d | 145 e | 146 f | 147 g
150 h | 151 i | 152 j | 153 k
154 l | 155 m | 156 n | 157 o
160 p | 161 q | 162 r | 163 s
164 t | 165 u | 166 v | 167 w
170 x | 171 y | 172 z | 173 {
174 | | 175 } | 176 ~ | 177 del
The table includes the octal number and either a character or
a name for a non-printing character, e.g. "nl" is the
new-line character.