From Wiktionary, the free dictionary
See also: ∣ [U+2223 DIVIDES] ,
׀ [U+05C0 HEBREW PUNCTUATION PASEQ] ,
ǀ [U+01C0 LATIN LETTER DENTAL CLICK] ,
〡 [U+3021 HANGZHOU NUMERAL ONE] ,
ㆳ [U+31B3 BOPOMOFO LETTER INNN] ,
丨 [U+4E28 CJK UNIFIED IDEOGRAPH-4E28] ,
| [U+007C VERTICAL LINE] , and Appendix:Variations of "i"
[unassigned: U+FFDD–U+FFDF]
Stroke order
The vertical line was said by Sejong the Great of Joseon to represent man as a mediator between yin (represented by ㅡ (eu , “eu”)) and yang ㆍ (ㆍ , “arae a”).
ㅣ • (i )
이 (i ), a vowel of the Korean alphabet, hangul
ㅐ ( ae )
ㅒ ( yae )
ㅔ ( e )
ㅖ ( ye )
ㅘ ( wa )
ㅙ ( wae )
ㅚ ( oe )
ㅝ ( wo )
ㅞ ( we )
ㅟ ( wi )
ㅢ ( ui )
ㆎ , ㆈ , ㆉ , ㆋ , ㆌ (all obsolete)