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Ln()Category: Number Syntax: Ln ( number ) Parameters: number ”any positive number or expression that returns a positive number. Description: Returns the natural logarithm of the specified number. The natural logarithm uses the transcendental number e as its base. The value of e is approximately 2.71828. Examples: Ln (2.7182818) Returns .9999999895305023 . Ln (Exp(1)) Returns 1 . Ln (100) Returns 4.6051701859880914 . Ln (Exp(5)) Returns 5 . Comments: Exp() and Ln() are inverse functions of one another. The Log() and Lg() functions produce base-10 and base-2 logarithms, respectively. The Ln() function produces base- e logarithms, but it can also be used to solve a logarithm of any base. The log, base- x , of y , is equivalent to the Ln (y) / Ln (x) . |
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