∫
Symbol  Format  Data 

∫  Code Point 
U+222B 
TeX 
\int 

SVG 
The integral symbol is used to represent integration in calculus. Typically, the integral symbol is used in an expression like the one below.
In plain language, this means take the integral of the function with respect to the variable from to . See integral notation for typesetting and more.
The contour integral symbol.
An integral can be geometrically interpreted as the area under the curve of a function between the two points a and b. Integrals are a core operator in calculus and are used throughout physics and higherlevel mathematics.