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| ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.25 + | Function
  Syntax: + `&rest` numbers sum Arguments and Values: number - a number. sum - a number. Description: Returns the sum of numbers, performing any necessary type conversions in the process. If no numbers are supplied, `0` is returned. Examples:
       (+)  0
       (+ 1)  1
       (+ 31/100 69/100)  1
       (+ 1/5 0.8)  1.0
Exceptional Situations: Might signal type-error if some argument is not a number. Might signal arithmetic-error. See Also: Section 12.1.1 Numeric Operations, Section 12.1.3 Rational Computations, Section 12.1.4 Floating-point Computations, Section 12.1.5 Complex Computations Allegro CL Implementation Details: None.

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