When you calculate log 1 x you should get an answer very close to x if x is small thats why these are called natural logarithms.
Base e of the given number. Because LN10 is a static property of Math you always use it as MathLN10 rather than as a property of a Math object you created Math is not a constructor. This function is the equivalent of Mathlogx Mathlog2. Example for the MathLog double and MathLog double double methods.