This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica Character Name


  • Unicode: 222B.
  • Alias: Esc int Esc.
  • Compound operator with built-in evaluation rules.
  • int f d x is by default interpreted as Integrate[f, x].
  • f d x is by default interpreted as Integral[f, {x, a, b}]. a and b must appear as a subscript and superscript, respectively.
  • int a ∘ b d x is by default output as int (a ∘ b) d x whenever ∘ is an operator with a precedence lower than ⋆.
  • Note the use of d, entered as Esc dd Esc or \[DifferentialD], rather than ordinary d.