Logarithm

The (natural) logarithm function works, in contrast to the previously described functions, only on one value. The natural logarithm is determine to the base $e$.

Syntax: $UF=ln(UF_1)$

Examples:

• $fun(x, ln(2), Obj)$; Realizes the function: $x=\ln{(2)} \simeq 0,6931$
• $fun(x, ln(-2), Obj)$; is evalued to $0$, because $x=\ln{(-2)}$ is not defined