GlyphIndexAntiderivative
∫ 2x dx = x² + C
The trailing dx names the variable of integration; C denotes a constant.
Integral sign
The integral sign ∫ introduces an integral. Write the expression to integrate, the variable, and any limits alongside it.
INTEGRAL
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Character details
♡→✦
3 code pointsMeaning and context
The integral sign ∫ introduces an integral. Write the expression to integrate, the variable, and any limits alongside it.
How to use it
Write a short integrand inline with clear parentheses. For complex fractions, multiple bounds or stacked limits, use mathematical typesetting rather than spacing characters.
Examples
Definite integral in words
∫ from 0 to 1 of 2x dx = 1
The bounds are written as words for a plain-text note.
Similar shapes, different characters
Latin capital S
U+0053The letter is not an integral operator.
Summation sign
U+2211A sum over terms and an integral are different operations.
DetailsSources and method
- Unicode 18.0.0 character database — Pinned standard character identities and properties; the application computes UTF encodings from the original text.
- Unicode character code charts — Reference glyphs are not a guarantee of the appearance in a user’s font.