Description
The ln function returns the natural logarithm of the parameter passed to it. The type of the value returned by this function is always real.
Parameter
The ln function's only parameter is a numeric expression (i.e. an expression of integral type or of real type).
Example
ln(1) returns 0.0
ln(exp(1)) returns 1.0
ln(100) returns 4.61Portability
Operating Systems: All
Standard Pascal: Yes