In the recent update of the app, we have included the handling of complex numbers. From now on, if you calculate `sqrt(-1)`

, the result is *i*. All the functions handle complex numbers so `cos(i)`

works as well. Complex numbers are useful in a wide variety of engineering calculations and also in many scientific problems.

We haven’t yet included Gaussian integers so number theoretic functions, such as `gcd`

, still work only with integers. We are going to add them in a future release.