UTF-8：修訂版本之間的差異

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<th>Description</th>
 
<th>Description</th>
 
</tr>
 
</tr>
−
<tr><td><a href='/0' title='ASCII Code 0'>0</a></td><td>000</td><td>00</td><td>00000000</td><td>NUL</td><td>&amp;#00;</td><td>&nbsp;</td><td>Null character</td></tr>
+
<tr><td>0</td><td>000</td><td>00</td><td>00000000</td><td>NUL</td><td>&amp;#00;</td><td>&nbsp;</td><td>Null character</td></tr>
−
<tr><td><a href='/1' title='ASCII Code 1'>1</a></td><td>001</td><td>01</td><td>00000001</td><td>SOH</td><td>&amp;#01;</td><td>&nbsp;</td><td>Start of Heading</td></tr>
+
<tr><td>1</td><td>001</td><td>01</td><td>00000001</td><td>SOH</td><td>&amp;#01;</td><td>&nbsp;</td><td>Start of Heading</td></tr>
−
<tr><td><a href='/2' title='ASCII Code 2'>2</a></td><td>002</td><td>02</td><td>00000010</td><td>STX</td><td>&amp;#02;</td><td>&nbsp;</td><td>Start of Text</td></tr>
+
<tr><td>2</td><td>002</td><td>02</td><td>00000010</td><td>STX</td><td>&amp;#02;</td><td>&nbsp;</td><td>Start of Text</td></tr>
−
<tr><td><a href='/3' title='ASCII Code 3'>3</a></td><td>003</td><td>03</td><td>00000011</td><td>ETX</td><td>&amp;#03;</td><td>&nbsp;</td><td>End of Text</td></tr>
+
<tr><td>3</td><td>003</td><td>03</td><td>00000011</td><td>ETX</td><td>&amp;#03;</td><td>&nbsp;</td><td>End of Text</td></tr>
−
<tr><td><a href='/4' title='ASCII Code 4'>4</a></td><td>004</td><td>04</td><td>00000100</td><td>EOT</td><td>&amp;#04;</td><td>&nbsp;</td><td>End of Transmission</td></tr>
+
<tr><td>4</td><td>004</td><td>04</td><td>00000100</td><td>EOT</td><td>&amp;#04;</td><td>&nbsp;</td><td>End of Transmission</td></tr>
−
<tr><td><a href='/5' title='ASCII Code 5'>5</a></td><td>005</td><td>05</td><td>00000101</td><td>ENQ</td><td>&amp;#05;</td><td>&nbsp;</td><td>Enquiry</td></tr>
+
<tr><td>5</td><td>005</td><td>05</td><td>00000101</td><td>ENQ</td><td>&amp;#05;</td><td>&nbsp;</td><td>Enquiry</td></tr>
−
<tr><td><a href='/6' title='ASCII Code 6'>6</a></td><td>006</td><td>06</td><td>00000110</td><td>ACK</td><td>&amp;#06;</td><td>&nbsp;</td><td>Acknowledge</td></tr>
+
<tr><td>6</td><td>006</td><td>06</td><td>00000110</td><td>ACK</td><td>&amp;#06;</td><td>&nbsp;</td><td>Acknowledge</td></tr>
−
<tr><td><a href='/7' title='ASCII Code 7'>7</a></td><td>007</td><td>07</td><td>00000111</td><td>BEL</td><td>&amp;#07;</td><td>&nbsp;</td><td>Bell, Alert</td></tr>
+
<tr><td>7</td><td>007</td><td>07</td><td>00000111</td><td>BEL</td><td>&amp;#07;</td><td>&nbsp;</td><td>Bell, Alert</td></tr>
−
<tr><td><a href='/8' title='ASCII Code 8'>8</a></td><td>010</td><td>08</td><td>00001000</td><td>BS</td><td>&amp;#08;</td><td>&nbsp;</td><td>Backspace</td></tr>
+
<tr><td>8</td><td>010</td><td>08</td><td>00001000</td><td>BS</td><td>&amp;#08;</td><td>&nbsp;</td><td>Backspace</td></tr>
−
<tr><td><a href='/9' title='ASCII Code 9'>9</a></td><td>011</td><td>09</td><td>00001001</td><td>HT</td><td>&amp;#09;</td><td>&nbsp;</td><td>Horizontal Tab</td></tr>
+
<tr><td>9</td><td>011</td><td>09</td><td>00001001</td><td>HT</td><td>&amp;#09;</td><td>&nbsp;</td><td>Horizontal Tab</td></tr>
−
<tr><td><a href='/10' title='ASCII Code 10'>10</a></td><td>012</td><td>0A</td><td>00001010</td><td>LF</td><td>&amp;#10;</td><td>&nbsp;</td><td>Line Feed</td></tr>
+
<tr><td>10</td><td>012</td><td>0A</td><td>00001010</td><td>LF</td><td>&amp;#10;</td><td>&nbsp;</td><td>Line Feed</td></tr>
−
<tr><td><a href='/11' title='ASCII Code 11'>11</a></td><td>013</td><td>0B</td><td>00001011</td><td>VT</td><td>&amp;#11;</td><td>&nbsp;</td><td>Vertical Tabulation</td></tr>
+
<tr><td>11</td><td>013</td><td>0B</td><td>00001011</td><td>VT</td><td>&amp;#11;</td><td>&nbsp;</td><td>Vertical Tabulation</td></tr>
−
<tr><td><a href='/12' title='ASCII Code 12'>12</a></td><td>014</td><td>0C</td><td>00001100</td><td>FF</td><td>&amp;#12;</td><td>&nbsp;</td><td>Form Feed</td></tr>
+
<tr><td>12</td><td>014</td><td>0C</td><td>00001100</td><td>FF</td><td>&amp;#12;</td><td>&nbsp;</td><td>Form Feed</td></tr>
−
<tr><td><a href='/13' title='ASCII Code 13'>13</a></td><td>015</td><td>0D</td><td>00001101</td><td>CR</td><td>&amp;#13;</td><td>&nbsp;</td><td>Carriage Return</td></tr>
+
<tr><td>13</td><td>015</td><td>0D</td><td>00001101</td><td>CR</td><td>&amp;#13;</td><td>&nbsp;</td><td>Carriage Return</td></tr>
−
<tr><td><a href='/14' title='ASCII Code 14'>14</a></td><td>016</td><td>0E</td><td>00001110</td><td>SO</td><td>&amp;#14;</td><td>&nbsp;</td><td>Shift Out</td></tr>
+
<tr><td>14</td><td>016</td><td>0E</td><td>00001110</td><td>SO</td><td>&amp;#14;</td><td>&nbsp;</td><td>Shift Out</td></tr>
−
<tr><td><a href='/15' title='ASCII Code 15'>15</a></td><td>017</td><td>0F</td><td>00001111</td><td>SI</td><td>&amp;#15;</td><td>&nbsp;</td><td>Shift In</td></tr>
+
<tr><td>15</td><td>017</td><td>0F</td><td>00001111</td><td>SI</td><td>&amp;#15;</td><td>&nbsp;</td><td>Shift In</td></tr>
−
<tr><td><a href='/16' title='ASCII Code 16'>16</a></td><td>020</td><td>10</td><td>00010000</td><td>DLE</td><td>&amp;#16;</td><td>&nbsp;</td><td>Data Link Escape</td></tr>
+
<tr><td>16</td><td>020</td><td>10</td><td>00010000</td><td>DLE</td><td>&amp;#16;</td><td>&nbsp;</td><td>Data Link Escape</td></tr>
−
<tr><td><a href='/17' title='ASCII Code 17'>17</a></td><td>021</td><td>11</td><td>00010001</td><td>DC1</td><td>&amp;#17;</td><td>&nbsp;</td><td>Device Control One (XON)</td></tr>
+
<tr><td>17</td><td>021</td><td>11</td><td>00010001</td><td>DC1</td><td>&amp;#17;</td><td>&nbsp;</td><td>Device Control One (XON)</td></tr>
−
<tr><td><a href='/18' title='ASCII Code 18'>18</a></td><td>022</td><td>12</td><td>00010010</td><td>DC2</td><td>&amp;#18;</td><td>&nbsp;</td><td>Device Control Two</td></tr>
+
<tr><td>18</td><td>022</td><td>12</td><td>00010010</td><td>DC2</td><td>&amp;#18;</td><td>&nbsp;</td><td>Device Control Two</td></tr>
−
<tr><td><a href='/19' title='ASCII Code 19'>19</a></td><td>023</td><td>13</td><td>00010011</td><td>DC3</td><td>&amp;#19;</td><td>&nbsp;</td><td>Device Control Three (XOFF)</td></tr>
+
<tr><td>19</td><td>023</td><td>13</td><td>00010011</td><td>DC3</td><td>&amp;#19;</td><td>&nbsp;</td><td>Device Control Three (XOFF)</td></tr>
−
<tr><td><a href='/20' title='ASCII Code 20'>20</a></td><td>024</td><td>14</td><td>00010100</td><td>DC4</td><td>&amp;#20;</td><td>&nbsp;</td><td>Device Control Four</td></tr>
+
<tr><td>20</td><td>024</td><td>14</td><td>00010100</td><td>DC4</td><td>&amp;#20;</td><td>&nbsp;</td><td>Device Control Four</td></tr>
−
<tr><td><a href='/21' title='ASCII Code 21'>21</a></td><td>025</td><td>15</td><td>00010101</td><td>NAK</td><td>&amp;#21;</td><td>&nbsp;</td><td>Negative Acknowledge</td></tr>
+
<tr><td>21</td><td>025</td><td>15</td><td>00010101</td><td>NAK</td><td>&amp;#21;</td><td>&nbsp;</td><td>Negative Acknowledge</td></tr>
−
<tr><td><a href='/22' title='ASCII Code 22'>22</a></td><td>026</td><td>16</td><td>00010110</td><td>SYN</td><td>&amp;#22;</td><td>&nbsp;</td><td>Synchronous Idle</td></tr>
+
<tr><td>22</td><td>026</td><td>16</td><td>00010110</td><td>SYN</td><td>&amp;#22;</td><td>&nbsp;</td><td>Synchronous Idle</td></tr>
−
<tr><td><a href='/23' title='ASCII Code 23'>23</a></td><td>027</td><td>17</td><td>00010111</td><td>ETB</td><td>&amp;#23;</td><td>&nbsp;</td><td>End of Transmission Block</td></tr>
+
<tr><td>23</td><td>027</td><td>17</td><td>00010111</td><td>ETB</td><td>&amp;#23;</td><td>&nbsp;</td><td>End of Transmission Block</td></tr>
−
<tr><td><a href='/24' title='ASCII Code 24'>24</a></td><td>030</td><td>18</td><td>00011000</td><td>CAN</td><td>&amp;#24;</td><td>&nbsp;</td><td>Cancel</td></tr>
+
<tr><td>24</td><td>030</td><td>18</td><td>00011000</td><td>CAN</td><td>&amp;#24;</td><td>&nbsp;</td><td>Cancel</td></tr>
−
<tr><td><a href='/25' title='ASCII Code 25'>25</a></td><td>031</td><td>19</td><td>00011001</td><td>EM</td><td>&amp;#25;</td><td>&nbsp;</td><td>End of medium</td></tr>
+
<tr><td>25</td><td>031</td><td>19</td><td>00011001</td><td>EM</td><td>&amp;#25;</td><td>&nbsp;</td><td>End of medium</td></tr>
−
<tr><td><a href='/26' title='ASCII Code 26'>26</a></td><td>032</td><td>1A</td><td>00011010</td><td>SUB</td><td>&amp;#26;</td><td>&nbsp;</td><td>Substitute</td></tr>
+
<tr><td>26</td><td>032</td><td>1A</td><td>00011010</td><td>SUB</td><td>&amp;#26;</td><td>&nbsp;</td><td>Substitute</td></tr>
−
<tr><td><a href='/27' title='ASCII Code 27'>27</a></td><td>033</td><td>1B</td><td>00011011</td><td>ESC</td><td>&amp;#27;</td><td>&nbsp;</td><td>Escape</td></tr>
+
<tr><td>27</td><td>033</td><td>1B</td><td>00011011</td><td>ESC</td><td>&amp;#27;</td><td>&nbsp;</td><td>Escape</td></tr>
−
<tr><td><a href='/28' title='ASCII Code 28'>28</a></td><td>034</td><td>1C</td><td>00011100</td><td>FS</td><td>&amp;#28;</td><td>&nbsp;</td><td>File Separator</td></tr>
+
<tr><td>28</td><td>034</td><td>1C</td><td>00011100</td><td>FS</td><td>&amp;#28;</td><td>&nbsp;</td><td>File Separator</td></tr>
−
<tr><td><a href='/29' title='ASCII Code 29'>29</a></td><td>035</td><td>1D</td><td>00011101</td><td>GS</td><td>&amp;#29;</td><td>&nbsp;</td><td>Group Separator</td></tr>
+
<tr><td>29</td><td>035</td><td>1D</td><td>00011101</td><td>GS</td><td>&amp;#29;</td><td>&nbsp;</td><td>Group Separator</td></tr>
−
<tr><td><a href='/30' title='ASCII Code 30'>30</a></td><td>036</td><td>1E</td><td>00011110</td><td>RS</td><td>&amp;#30;</td><td>&nbsp;</td><td>Record Separator</td></tr>
+
<tr><td>30</td><td>036</td><td>1E</td><td>00011110</td><td>RS</td><td>&amp;#30;</td><td>&nbsp;</td><td>Record Separator</td></tr>
−
<tr><td><a href='/31' title='ASCII Code 31'>31</a></td><td>037</td><td>1F</td><td>00011111</td><td>US</td><td>&amp;#31;</td><td>&nbsp;</td><td>Unit Separator</td></tr>
+
<tr><td>31</td><td>037</td><td>1F</td><td>00011111</td><td>US</td><td>&amp;#31;</td><td>&nbsp;</td><td>Unit Separator</td></tr>
 
</table>
 
</table>
 +
 
====32~31 控制字元====
 
====32~31 控制字元====
  

2023年6月24日 (六) 21:24的修訂版本

UTF-8編碼位元組含義：

  • ◽◾◾◾◾◾◾◾，對於UTF-8編碼中的任意位元組B，如果B的第一位為0，則B獨立的表示一個字元(ASCII碼)；
  • ◾◽??????，128~191，如果B的第一位為1，第二位為0，則B為一個多位元組字元中的一個位元組(非ASCII字元)；
識別位元固定為 128 ，表值 0~63。
  • ◾◾◽?????，192~223，如果B的前兩位為1，第三位為0，則B為兩個位元組表示的字元中的第一個位元組；
識別位元固定為 192 ，(0~31)×64。
  • ◾◾◾◽????，224~239，如果B的前三位為1，第四位為0，則B為三個位元組表示的字元中的第一個位元組；
  • ◾◾◾◾◽???，240~247，如果B的前四位為1，第五位為0，則B為四個位元組表示的字元中的第一個位元組；

組成字(以「瓦」的中文 3 byte 為例)：

  1. 第一 byte 231， 231-224=7 ，單位 4096
  2. 第二 byte 147， 147-128=19 ，單位 64
  3. 第三 byte 166， 166-128=38 ，單位 1
字碼 = 7×4096+19×64+38=29926 ，字碼寫成 &#29926;

0~127

0~31 控制字元

DEC OCT HEX BIN Symbol HTML Number HTML Name Description
00000000000000NUL&#00; Null character
10010100000001SOH&#01; Start of Heading
20020200000010STX&#02; Start of Text
30030300000011ETX&#03; End of Text
40040400000100EOT&#04; End of Transmission
50050500000101ENQ&#05; Enquiry
60060600000110ACK&#06; Acknowledge
70070700000111BEL&#07; Bell, Alert
80100800001000BS&#08; Backspace
90110900001001HT&#09; Horizontal Tab
100120A00001010LF&#10; Line Feed
110130B00001011VT&#11; Vertical Tabulation
120140C00001100FF&#12; Form Feed
130150D00001101CR&#13; Carriage Return
140160E00001110SO&#14; Shift Out
150170F00001111SI&#15; Shift In
160201000010000DLE&#16; Data Link Escape
170211100010001DC1&#17; Device Control One (XON)
180221200010010DC2&#18; Device Control Two
190231300010011DC3&#19; Device Control Three (XOFF)
200241400010100DC4&#20; Device Control Four
210251500010101NAK&#21; Negative Acknowledge
220261600010110SYN&#22; Synchronous Idle
230271700010111ETB&#23; End of Transmission Block
240301800011000CAN&#24; Cancel
250311900011001EM&#25; End of medium
260321A00011010SUB&#26; Substitute
270331B00011011ESC&#27; Escape
280341C00011100FS&#28; File Separator
290351D00011101GS&#29; Group Separator
300361E00011110RS&#30; Record Separator
310371F00011111US&#31; Unit Separator

32~31 控制字元

===等價===： 「◾◽??????」與「◽◽??????」皆合法且等價

  1. https://graphemica.com/%C2%A1
  2. https://www.ascii-code.com/
  3. http://jendo.org/study/showChar.html
  4. http://jendo.org/study/seeDecode.php
取自「http://well-being-ng.net/wellBeingNg/index.php?title=UTF-8&oldid=14988」