This arithmetic predicate calculates the natural logarithm of it's argument.
see also: arithmetic in Prolog is/2 log10
| Examples | |
| X is log(0.9). | succeeds, X is - 0.1053605 |
| X is log(34.8). | succeeds, X is 3.549617 |
| Exceptions | |
| The result exceeds the floating point range | an evaluation_error(float_overflow) exception is thrown |
| Value of the argument Arg is equal or less than 0 | a domain_error(value, Arg) exception is thrown |