## Integral

Function

Integral(function)

 function

Integral(function, start, end)

 function start end

Integral(function, varName)

 function varName

Integral(function, varName, start, end)

 function varName start end

Integral is included by default in each file as part of the Math library.

##### Use

The Integral() function returns the integral of a function using numerical methods.

It returns the definite integral when provided with limits. It can also return the numerical approximation of the indefinite integral as a function that can be used in other equations.

The input for Integral() is given as a named custom function, or as an in-line function. If no additional inputs are given, the result is a function. Otherwise, the limits can be provided, and the result is the definite integral.

Units can be used, but care must be taken that the limit inputs and the integral outputs work together.

##### Simple examples
• `Integral(x=>x^2+x+1)  = Function`
• `Integral(x=>x^2+x+1, 0, 5)  = 59.167`
##### Example using the resulting function ##### Definite integral example using units 