LN10 (Natural Logarithm of 10) This property is used to return the value of the natural logarithm of ten, which is 2.302585092994046. As with all math properties, it is used with the Math object. syntax: Math.LN10 EXAMPLE variableOne = Math.LN10; documnet.write("The natural logarithm of two is " + variableOne); The above example will write the following to the screen "The natural logarithm of ten is 2.302585092994046".