Missing functions

[terrarier2111]

The following functions might be nice additions: acos, asin, atan, ln, gamma, floor, ceil

[terrarier2111]

Also there should be a way to get the decimal portion of a float number

[nadavrot]

Thank you @terrarier2111 . It would be good to add these functions. I think that ln should be easy to add using the existing methods. Want to give it a try?