NATURAL LOGARITHM (LN)

(Mathematics) The value of the exponent that the base, e, must have to equal a given number. It is calculated as ex = y, where x is the logarithm. For example, the natural logarithm of 5 is the power (x) to which e (approximately equal to 2.718282) must be raised to equal 5, or ex = 5, which is equivalent to approximately 1.60944. Also written as ln 5 = 1.60944. Also see Logarithm (Log).