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7.1.21 LOG
The LOG function returns a numeric value that approximates the logarithm to the base e (natural log) of the argument specified.
The function type is numeric. 



    ___ Format _____________________________________________________________ 
   |                                                                        |
   | >>__FUNCTION LOG__(argument-1)______________________________________>< |
   |                                                                        |
   |________________________________________________________________________|
argument-1
Must be class numeric. The value of argument-1 must be greater than zero.
The returned value is the approximation of the logarithm to the base e of argument-1.

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