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.