What ≟ means
It marks a question, not a result.
Between two expressions, ≟ asks whether they are equal. It does not tell you whether the writer is checking a result, proposing an unproved claim, or marking a step to prove; explain that convention nearby if it matters.
A 1998 web standard called MathML lists it in its relation-symbol catalogue as equest.
Don't confuse it with
2Questions people ask
1Why does ≟ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ≟
Windows (Word)
Alt+XType 225F, then Alt+X to get ≟.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “questioned equal to”.
Linux
Ctrl+Shift+UType 225f, then Enter or Space.
HTML
≟CSS
\225FLaTeX with STIX
In LaTeX, use `\questeq` when the document uses the STIX or STIX Two math font.
Codes and encoding1 code points
HTML decimal
≟
HTML hex
≟
CSS content
content: "\225F";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%89%9F
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.