DifferentialD 
DifferentialD
displays as x.
Details
- DifferentialD[x] has no built-in meaning.
- x is by default interpreted as DifferentialD[x].
- can be entered as \[DifferentialD] or
dd
.
Examples
Basic Examples (3)
Use 
int
to enter ∫ and 
dd
to enter :
∫Sqrt[x]ⅆxUse InputForm:
Integrate[Sqrt[x], x]Use 
to enter the lower limit, then 
for the upper limit:
Subsuperscript[∫, 0, ∞] Exp[-x^2]ⅆxA multiple integral with x integration outermost:
Subsuperscript[∫, 0, 1]Subsuperscript[∫, 0, x]Cos[x y]ⅆyⅆxUse InputForm:
Integrate[Cos[x y], {x, 0, 1}, {y, 0, x}]
Wolfram Research (1996), DifferentialD, Wolfram Language function, https://reference.wolfram.com/language/ref/DifferentialD.html.
Text
Wolfram Research (1996), DifferentialD, Wolfram Language function, https://reference.wolfram.com/language/ref/DifferentialD.html.
CMS
Wolfram Language. 1996. "DifferentialD." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DifferentialD.html.
APA
Wolfram Language. (1996). DifferentialD. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DifferentialD.html