U+2194 LEFT RIGHT ARROW
U+2194 was added to Unicode in version 1.1 (1993). It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as z notation relation.
The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+2194 behaves as Ambiguous (Alphabetic or Ideographic) regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
The CLDR project labels this character “leftright arrow” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: arrow, leftright arrow.
This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with
The Wikipedia has the following information about this codepoint:
In logic and related fields such as mathematics and philosophy, "if and only if" (shortened as "iff") is a biconditional logical connective between statements, where either both statements are true or both are false.
The connective is biconditional (a statement of material equivalence), and can be likened to the standard material conditional ("only if", equal to "if ... then") combined with its reverse ("if"); hence the name. The result is that the truth of either one of the connected statements requires the truth of the other (i.e. either both statements are true, or both are false), though it is controversial whether the connective thus defined is properly rendered by the English "if and only if"—with its preexisting meaning. For example, P if and only if Q means that P is true whenever Q is true, and the only case in which P is true is if Q is also true, whereas in the case of P if Q, there could be other scenarios where P is true and Q is false.
In writing, phrases commonly used as alternatives to P "if and only if" Q include: Q is necessary and sufficient for P, for P it is necessary and sufficient that Q, P is equivalent (or materially equivalent) to Q (compare with material implication), P precisely if Q, P precisely (or exactly) when Q, P exactly in case Q, and P just in case Q. Some authors regard "iff" as unsuitable in formal writing; others consider it a "borderline case" and tolerate its use.
In logical formulae, logical symbols, such as ↔ {displaystyle leftrightarrow } and ⇔ {displaystyle Leftrightarrow } , are used instead of these phrases; see § Notation below.
Representations
System  Representation 

Nº  8596 
UTF8  E2 86 94 
UTF16  21 94 
UTF32  00 00 21 94 
URLQuoted  %E2%86%94 
HTMLEscape  ↔ 
Wrong windows1252 Mojibake  â 
HTMLEscape  ↔ 
HTMLEscape  ↔ 
HTMLEscape  ↔ 
alias  z notation relation 
Encoding: EUCKR (hex bytes)  A1 EA 
L^{A}T_{E}X  \leftrightarrow 
AGL: Latin5  arrowboth 
Adobe Glyph List  arrowboth 
digraph  <> 
Related Characters
Elsewhere
Complete Record
Property  Value 

1.1 (1993)  
LEFT RIGHT ARROW  
—  
Arrows  
Math Symbol  
Common  
Other Neutral  
Not Reordered  
None  


✘  




✘  










✘  
✘  
✘  
✘  


None  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
Ambiguous  
✘  
✘  
✘  
✔  
✘  
✘  
✔  


Any  
✔  
✘  
✘  
✘  
Not Applicable  
✘  
✘  
✘  
✘  
✘  
✘  
—  
NA  
Other  
—  
No_Joining_Group  
✘  
—  
Non Joining  
Ambiguous (Alphabetic or Ideographic)  
✘  
✔  
✘  
Yes  
Yes  


Yes  
Yes  
None  
not a number  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✔  
✘  
✘  
✘  
✘  
✘  
Other  


✘  
✘  
✘  
✘  
R  
✘  
Other  
✘  
✘  
✘  
✘  
✘  
✘  
✘ 