定義
半角公式舉例
用法
半角的顯示內碼都是一個位元組。在系統內部，以上三種字元是作為基本代碼處理的，所以用戶輸入命令和參數時一般都使用半角。
全形
漢字屬於全形。全形與半角屬於轉換關係，具體請參閱“全形”詞條。
全形與半角符號比較
ASCII | 全形字元 | Unicode | 半角字元 | Unicode |
0x20 | " "空格 | U+3000 | " "空格 | U+0020 |
0x21 | ！ | U+ff01 | ! | U+0021 |
0x22 | " | U+ff02 | " | U+0022 |
0x23 | # | U+ff03 | # | U+0023 |
0x24 | $ | U+ff04 | $ | U+0024 |
0x25 | % | U+ff05 | % | U+0025 |
0x26 | & | U+ff06 | & | U+0026 |
0x27 | ' | U+ff07 | ' | U+0027 |
0x28 | （ | U+ff08 | ( | U+0028 |
0x29 | ） | U+ff09 | ) | U+0029 |
0x2a | * | U+ff0a | * | U+002a |
0x2b | + | U+ff0b | + | U+002b |
0x2c | ， | U+ff0c | , | U+002c |
0x2d | － | U+ff0d | - | U+002d |
0x2e | ． | U+ff0e | . | U+002e |
0x2f | / | U+ff0f | / | U+002f |
0x30 | 0 | U+ff10 | 0 | U+0030 |
0x31 | 1 | U+ff11 | 1 | U+0031 |
0x32 | 2 | U+ff12 | 2 | U+0032 |
0x33 | 3 | U+ff13 | 3 | U+0033 |
0x34 | 4 | U+ff14 | 4 | U+0034 |
0x35 | 5 | U+ff15 | 5 | U+0035 |
0x36 | 6 | U+ff16 | 6 | U+0036 |
0x37 | 7 | U+ff17 | 7 | U+0037 |
0x38 | 8 | U+ff18 | 8 | U+0038 |
0x39 | 9 | U+ff19 | 9 | U+0039 |
0x3a | ： | U+ff1a | : | U+003a |
0x3b | ； | U+ff1b | ; | U+003b |
0x3c | < | U+ff1c | < | U+003c |
0x3d | = | U+ff1d | = | U+003d |
0x3e | > | U+ff1e | > | U+003e |
0x3f | ？ | U+ff1f | ? | U+003f |
0x40 | @ | U+ff20 | @ | U+0040 |
0x41 | A | U+ff21 | A | U+0041 |
0x42 | B | U+ff22 | B | U+0042 |
0x43 | C | U+ff23 | C | U+0043 |
0x44 | D | U+ff24 | D | U+0044 |
0x45 | E | U+ff25 | E | U+0045 |
0x46 | F | U+ff26 | F | U+0046 |
0x47 | G | U+ff27 | G | U+0047 |
0x48 | H | U+ff28 | H | U+0048 |
0x49 | I | U+ff29 | I | U+0049 |
0x4a | J | U+ff2a | J | U+004a |
0x4b | K | U+ff2b | K | U+004b |
0x4c | L | U+ff2c | L | U+004c |
0x4d | M | U+ff2d | M | U+004d |
0x4e | N | U+ff2e | N | U+004e |
0x4f | O | U+ff2f | O | U+004f |
0x50 | P | U+ff30 | P | U+0050 |
0x51 | Q | U+ff31 | Q | U+0051 |
0x52 | R | U+ff32 | R | U+0052 |
0x53 | S | U+ff33 | S | U+0053 |
0x54 | T | U+ff34 | T | U+0054 |
0x55 | U | U+ff35 | U | U+0055 |
0x56 | V | U+ff36 | V | U+0056 |
0x57 | W | U+ff37 | W | U+0057 |
0x58 | X | U+ff38 | X | U+0058 |
0x59 | Y | U+ff39 | Y | U+0059 |
0x5a | Z | U+ff3a | Z | U+005a |
0x5b | [ | U+ff3b | [ | U+005b |
0x5c | \ | U+ff3c | \ | U+005c |
0x5d | ] | U+ff3d | ] | U+005d |
0x5e | ^ | U+ff3e | ^ | U+005e |
0x5f | _ | U+ff3f | _ | U+005f |
0x60 | ` | U+ff40 | ` | U+0060 |
0x61 | a | U+ff41 | a | U+0061 |
0x62 | b | U+ff42 | b | U+0062 |
0x63 | c | U+ff43 | c | U+0063 |
0x64 | d | U+ff44 | d | U+0064 |
0x65 | e | U+ff45 | e | U+0065 |
0x66 | f | U+ff46 | f | U+0066 |
0x67 | g | U+ff47 | g | U+0067 |
0x68 | h | U+ff48 | h | U+0068 |
0x69 | i | U+ff49 | i | U+0069 |
0x6a | j | U+ff4a | j | U+006a |
0x6b | k | U+ff4b | k | U+006b |
0x6c | l | U+ff4c | l | U+006c |
0x6d | m | U+ff4d | m | U+006d |
0x6e | n | U+ff4e | n | U+006e |
0x6f | o | U+ff4f | o | U+006f |
0x70 | p | U+ff50 | p | U+0070 |
0x71 | q | U+ff51 | q | U+0071 |
0x72 | r | U+ff52 | r | U+0072 |
0x73 | s | U+ff53 | s | U+0073 |
0x74 | t | U+ff54 | t | U+0074 |
0x75 | u | U+ff55 | u | U+0075 |
0x76 | v | U+ff56 | v | U+0076 |
0x77 | w | U+ff57 | w | U+0077 |
0x78 | x | U+ff58 | x | U+0078 |
0x79 | y | U+ff59 | y | U+0079 |
0x7a | z | U+ff5a | z | U+007a |
0x7b | { | U+ff5b | { | U+007b |
0x7c | | | U+ff5c | | | U+007c |
0x7d | } | U+ff5d | } | U+007d |
0x7e | ～ | U+ff5e | ~ | U+007e |
