用Alt码打出Pi以及各式各样的符号
使用方法：
确认NumLock开启，按住Alt键，然后一次在小键盘上点击这些数字然后松开Alt键即可。
（部分为自己尝试得出，其余收集与网络）
Alt+33 !
Alt+34 ”
Alt+35 #
Alt+36 $
Alt+37 %
Alt+38 &
Alt+39
Alt+40 (
Alt+41 )
Alt+42 *
Alt+43 +
Alt+44 ,
Alt+45 -
Alt+46 .
Alt+60 <
Alt+61 =
Alt+62 >
Alt+63 ?
Alt+64 @
Alt+65 - Alt+90 A-Z
Alt+91 [
Alt+92 \
Alt+93 ]
Alt+94 ^
Alt+95 _
Alt+96 `
Alt+97 - Alt+122 a-z
Alt+123 {
Alt+124 |
Alt+125 }
Alt+126 ~
Alt+128 €
Alt+130 ‚
Alt+131 ƒ
Alt+132 „
Alt+133 …
Alt+134 †
Alt+135 ‡
Alt+136 ˆ
Alt+137 ‰
Alt+138 Š
Alt+139 ‹
Alt+140 Œ
Alt+145 ‘
Alt+146 ’
Alt+147 “
Alt+148 ”
Alt+149 •
Alt+150 –
Alt+151 —
Alt+152 0˜
Alt+153 ™
Alt+154 š
Alt+155 ›
Alt+156 œ
Alt+158 ž
Alt+159 Ÿ
Alt+160 ¡
Alt+161 ¢
Alt+163 £
Alt+164 ¤
Alt+165 ¥
Alt+166 ¦
Alt+167 §
Alt+168 ¨
Alt+169 ©
Alt+170 ª
Alt+171 «
Alt+172 ¬
Alt+173
Alt+174 ®
Alt+175 ¯
Alt+176 °
Alt+177 ±
Alt+178 ²
Alt+179 ³
Alt+180 ´
Alt+181 µ
Alt+182 ¶
Alt+183 ·
Alt+184 ¸
Alt+185 ¹
Alt+186 º
Alt+187 »
Alt+188 ¼
Alt+189 ½
Alt+190 ¾
Alt+191 ¿
○41395 ●41396
△41397 ▲41398
◎41399
☆41400 ★41401
◇41402 ◆41403
□41404 ■41405
▽41406 ▼41407
♀41456 ♂41457
⊕41458 ⊙41459
㊣41408
℅41409
▁41570 ▂41571 ▃41572 ▄41573 ▅41574 ▆41575 ▇41576 █41577
▏41578 ▎41579 ▍41580 ▌41581 ▋41582 ▊41583 ▉41584
┼41585 ┴41586 ┬41587 ┤41588 ├41589
▔41590 ─41591 │41592 ▕41593
┌41594 ┐41595 └41596 ┘41597
╭41598 ╮41633 ╰41634 ╯41635
═41636 ╞41637 ╪41638 ╡41639
◢41640 ◣41641 ◥41642 ◤41643
╱41644 ╲41645 ╳41646
╔63965 ╦63966 ╗63967
╠63968 ╬63969 ╣63970
╚63971 ╩63972 ╝63973
╒63974 ╤63975 ╕63976
╞63977 ╪63978 ╡63979
╘63980 ╧63981 ╛63982
╓63983 ╥63984 ╖63985
╟63986 ╫63987 ╢63988
╙63989 ╨63990 ╜63991
║63992 ═63993
↑41460 ↓41461 ←41462 →41463 ↖41464 ↗41465 ↙41466 ↘41467
，41281 、41282 。41283
．41284 ‧41285
；41286 ：41287 ？41288 ！41289 ︰41290 …41291 ‥41292
﹐41293
﹑41294
﹒41295
41296 (半形)
﹔41297
﹕41298
﹖41299
﹗41300
｜41301 –41302 ︱41303 —41304 ︳41305 ╴41306
︴41307 ﹏41308
（41309 ）41310
︵41311 ︶41312
｛41313 ｝41314
︷41315 ︸41316
〔41317 〕41318
︹41319 ︺41320
【41321 】41322
︻41323 ︼41324
《41325 》41326
︽41327 ︾41328
〈41329 〉41330
︿41331 ﹀41332
「41333 」41334
﹁41335 ﹂41336
『41337 』41338 ﹃41339 ﹄41340
﹙41341
﹚41342
﹛41377 ﹜41378
﹝41379 ﹞41380
‘41381 ’41382
“41383 ”41384
〝41385 〞41386
‵41387 ′41388
＃41389 ＆41390 ＊41391 ※41392
§41393 (半形)
〃41394
¯41410 (半形)
￣41411 ＿41412 ˍ41413 ﹉41414 ﹊41415 ﹍41416 ﹎41417 ﹋41418 ﹌41419
﹟41420 ﹠41421 ﹡41422
＄41539
￥41540
〒41541
￠41542
￡41543
％41544
＠41545
℃41546 ℉41547
﹩41548
﹪41549
﹫41550
㏕41551 ㎜41552 ㎝41553 ㎞41554 ㏎41555 ㎡41556 ㎎41557 ㎏41558 ㏄41559
°41560 (半形)
兙41561 兛41562 兞41563 兝41564 兡41565 兣41566 嗧41567 瓩41568 糎41569
Ⅰ41657
Ⅱ41658
Ⅲ41659
Ⅳ41660
Ⅴ41661
Ⅵ41662
Ⅶ41663
Ⅷ41664
Ⅸ41665
Ⅹ41666
Α41796 α41820
Β41797 β41821
Γ41798 γ41822
Δ41799 δ41823
Ε41800 ε41824
Ζ41801 ζ41825
Η41802 η41826
Θ41803 θ41827
Ι41804 ι41828
Κ41805 κ41829
Λ41806 λ41830
Μ41807 μ41831
Ν41808 ν41832
Ξ41809 ξ41833
Ο41810 ο41834
Π41811 π41835
Ρ41812 ρ41836
Σ41813 σ41837
Τ41814 τ41838
Υ41815 υ41839
Φ41816 φ41840
Χ41817 χ41841
Ψ41818 ψ41842
Ω41819 ω41843
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