# annulus_monte_carlo

annulus_monte_carlo, a C++ code which uses the Monte Carlo method to estimate the integral of a function over the interior of a circular annulus in 2D.

A circular annulus with center (XC,YC), inner radius R1 and outer radius R2, is the set of points (X,Y) so that

```      R1^2 <= (X-XC)^2 + (Y-YC)^2 <= R2^2
```

### Languages:

annulus_monte_carlo is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

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### Source Code:

Last revised on 23 January 2020.