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  Argument
 
    number         Real expression
 
  Returns
 
    <real type>    Exponential of a number
 
  Description
 
    The Exp function returns the exponential of a real number. The
    exponential of a number is the result of the mathematical constant e
    raised to a power given by number.
 
    The mathematical constant e is the base of the natural logarithms,
    and is approximately 2.71828182845905.