How do I type the ⍰ apl functional symbol quad question symbol?

On Windows, type 2370 and press Alt+X. On Linux press Ctrl+Shift+U then 2370. On any system the quickest route is the copy button on this page.

What is the code for ⍰?

Apl Functional Symbol Quad Question is U+2370 and in LaTeX as \APLboxquestion. In UTF-8 it takes 3 bytes. The table above lists every escape format.

What kind of character is ⍰?

Apl Functional Symbol Quad Question is filed under Other symbol in the Miscellaneous Technical block, and was introduced in Unicode 1.1. Unicode files this under "other symbol" — the catch-all for pictographs, signs and marks that are neither maths, currency, nor letter-like. It is the largest symbol category in the standard.

U+2370 · Other symbol

LaTeX

\APLboxquestion

Apl Functional Symbol Quad Question Symbol ⍰

⍰ is apl functional symbol quad question, U+2370 — \APLboxquestion in LaTeX. It was added in Unicode 1.1, and Unicode files it under Other symbol.

Codes & technical data

Unicode	`U+2370`
HTML hex	`⍰`
HTML decimal	`⍰`
CSS	`\2370`
JavaScript	`\u{2370}`
Python	`\U00002370`
Java / C#	`\u2370`
Rust	`\u{2370}`
Swift	`\u{2370}`
PHP	`\u{2370}`
URL encoded	`%E2%8D%B0`
UTF-8 bytes	`E2 8D B0`
UTF-16 bytes	`2370`
Base64	`4o2w`
Decimal	`9072`
LaTeX	`\APLboxquestion`
Category	Other symbol (So)
Introduced	Unicode 1.1

Will ⍰ survive being pasted?

Normalisation. Yes. ⍰ is unchanged by NFKC, so it survives normalising systems intact.
Legacy encodings. ⍰ is Unicode-only — it has no Latin-1 equivalent, so a system stuck on an 8-bit encoding cannot represent it.
Size. 3 bytes in UTF-8. Character-limited fields — SMS, bios, some form validators — usually count bytes, not characters.

Unicode cross-references

The standard points readers of ⍰ at these characters — usually because they look alike, or because one is the correct choice where the other is often used by mistake.

⯑U+2BD1uncertainty sign

Nearby in Miscellaneous Technical

Symbols from engineering, electronics and computing: APL operators, keyboard keys, dentistry and cartography marks. The ⌘ ⌥ ⇧ ⏎ keys people paste into shortcut documentation live here.

All 256 characters in Miscellaneous Technical →

How to type ⍰

Windows	Type `2370` then press `Alt`+`X`
macOS	Press `Ctrl`+`Cmd`+`Space`, then search for “apl functional symbol quad question”
Linux	Press `Ctrl`+`Shift`+`U`, type `2370`, press `Enter`
HTML	`⍰`

About Unicode’s Other symbol category

Unicode files this under "other symbol" — the catch-all for pictographs, signs and marks that are neither maths, currency, nor letter-like. It is the largest symbol category in the standard.

Frequently asked questions

How do I type the ⍰ apl functional symbol quad question symbol?: On Windows, type 2370 and press Alt+X. On Linux press Ctrl+Shift+U then 2370. On any system the quickest route is the copy button on this page.
What is the code for ⍰?: Apl Functional Symbol Quad Question is U+2370 and in LaTeX as \APLboxquestion. In UTF-8 it takes 3 bytes. The table above lists every escape format.
What kind of character is ⍰?: Apl Functional Symbol Quad Question is filed under Other symbol in the Miscellaneous Technical block, and was introduced in Unicode 1.1. Unicode files this under "other symbol" — the catch-all for pictographs, signs and marks that are neither maths, currency, nor letter-like. It is the largest symbol category in the standard.