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# Template:Iint/doc

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[⧼Purge⧽ Template:Iint/doc]

The {{iint}} mathematical formatting template calls the {{integral}} template with the type argument set to iint or [the nicer looking] 2int (double integral).

## Usage

{{iint|lower limit|upper limit|integrand}}

or

{{iint|lower limit|upper limit|integrand|format}}

or

{{iint|lower limit|upper limit}} integrand

or

{{iint|lower limit|upper limit|format}} integrand

where format is among:

• htm: text style HTML+CSS (default);
• tex: text style LaTeX;
• HTM: display style HTML+CSS;
• TEX: display style LaTeX.

## Examples

The code

: {{repeat|2|{{repeat|10|yadda{{nbsp}}}}{{nl}}}}before {{math|{{iint|''D''}} ''f''{{sp|2}}(''x'', ''y'') {{d|''x''}}{{sp|3}}{{d|''y''}}{{sp|1}} {{=}} <!--
-->{{iint|''T''}} ''f''{{sp|2}}({{sp|2}}''{{Gr|rho}}'' cos ''{{Gr|varphi}}'', ''{{Gr|rho}}'' sin ''{{Gr|varphi}}'') ''{{Gr|rho}}''{{sp|3}}{{d|''{{Gr|rho}}''}}{{sp|3}}{{d|''{{Gr|varphi}}''}}.
|tex = \iint_{D} f(x,y) \, dx \, dy = \iint_{T} f( \rho \cos \varphi,\rho \sin \varphi ) \, \rho \, d\rho \, d\varphi .


yields the text style HTML+CSS

before
 D D
f  (x, y) dxdy  =
 T T
f  (  ρ cos φ, ρ sin φ) ρdρdφ.
after
and with the $ option, yields the text style LaTeX yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda before ${\displaystyle \textstyle {\iint _{D}f(x,y)\,dx\,dy=\iint _{T}f(\rho \cos \varphi ,\rho \sin \varphi )\,\rho \,d\rho \,d\varphi .}}$ after yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda yadda The code : {{math|{{iint|''D''||HTM}} ''f''{{sp|2}}(''x'', ''y'') {{d|''x''}}{{sp|3}}{{d|''y''}}{{sp|1}} {{=}} <!-- -->{{iint|''T''||HTM}} ''f''{{sp|2}}({{sp|2}}''{{Gr|rho}}'' cos ''{{Gr|varphi}}'', ''{{Gr|rho}}'' sin ''{{Gr|varphi}}'') ''{{Gr|rho}}''{{sp|3}}{{d|''{{Gr|rho}}''}}{{sp|3}}{{d|''{{Gr|varphi}}''}}. |tex = \iint_{D} f(x,y) \, dx \, dy = \iint_{T} f( \rho \cos \varphi,\rho \sin \varphi ) \, \rho \, d\rho \, d\varphi . |&&}}  yields the display style HTML+CSS  D D f (x, y) dxdy =  T T f ( ρ cos φ, ρ sin φ) ρdρdφ. and with the $\$ option, yields the display style LaTeX
${\displaystyle {\begin{array}{l}\displaystyle {\iint _{D}f(x,y)\,dx\,dy=\iint _{T}f(\rho \cos \varphi ,\rho \sin \varphi )\,\rho \,d\rho \,d\varphi .}\end{array}}}$
{{integral|2int<!--iint-->|{{{1|}}}|{{{2|}}}|{{{3|}}}|{{{4|}}}}}