∫
Math Operator 222B in Mathematics
In Mathematics, the Math Operator 222B symbol (∫) is commonly used. Learn how to copy and use it in your technical documents.
Unicode
U+222B
HTML Entity
∫
LaTeX Sequence
\mathoperator222b
Primary Field
MathematicsMathematics Application
The integral sign represents integration — summing infinitely many infinitesimal pieces. A definite integral ∫₊ᵇ f(x)dx gives the area under a curve; an indefinite integral gives an antiderivative. It is fundamental to calculus, physics and engineering.
How to type Integral (∫)
- Fastest: click ∫ on the keyboard above — it copies to your clipboard, ready to paste into Word, Google Docs, email or a forum.
- Unicode: the code point is shown in the panel above; on Windows you can also use Alt‑X after the hex code in Word.
- LaTeX: use the command shown above inside math mode.
- Anywhere: because it’s standard Unicode, it keeps its exact form across apps and devices.
Frequently asked questions
What is the difference between a definite and indefinite integral?
A definite integral has limits and yields a number (e.g. an area); an indefinite integral yields a family of functions plus a constant.
How do I type the integral sign?
Copy it from the keyboard above, or use LaTeX \int and the Unicode/HTML shown above.
Write mathematical and scientific expressions
Need to pair this symbol with other operators?