[1] 
[DFN[文字列連結]]や[DFN[バイト列連結]]は、
複数の[[文字列]]や[[バイト列]]を1つの[[文字列]]や[[バイト列]]に単純に結合する[[演算]]です。


[5] 
いろいろな[[演算子]]が使われます。

[FIG(short list)[ [6] [[文字列]]や[[バイト列]]の連結演算
- [[連接]]
- [CODE[.][. (Perl)]]
- [CODE[+]]
- [CODE[||]]
]FIG]

-
[FIG(quote)[
[FIGCAPTION[
[3] [CITE@en[RFC 7515 - JSON Web Signature (JWS)]]
([TIME[2020-03-29 16:13:43 +09:00]])
<https://tools.ietf.org/html/rfc7515#section-1.1>
]FIGCAPTION]

> The concatenation of two values A and B is denoted as A || B.

]FIG]
-
[4] 
[CITE@en[[[RFC 7516]] - JSON Web Encryption (JWE)]], [TIME[2022-11-23T02:49:00.000Z]] <https://datatracker.ietf.org/doc/html/rfc7516#section-1.1>
-
[7] 
[CITE@en[[[RFC 7517]]: JSON Web Key (JWK)]], [TIME[2022-11-25T08:33:34.000Z]] <https://www.rfc-editor.org/rfc/rfc7517.html#section-1.1>
-
[FIG(quote)[
[FIGCAPTION[
[2] [CITE@en[RFC 7518 - JSON Web Algorithms (JWA)]]
([TIME[2019-11-27 04:11:14 +09:00]])
<https://tools.ietf.org/html/rfc7518#section-1.1>
]FIGCAPTION]

> The concatenation of two values A and B is denoted as A || B.

]FIG]