The log function returns the logarithm to the base 10 of the parameter passed to it. The type of the value returned by this function is always real.
The log function's only parameter is a numeric expression (i.e. an expression of integral type or of real type).
log(1) returns 0.0
ln(10) returns 1.0
ln(100) returns 2.0
Operating Systems: All
Standard Pascal: No