+ (ANSI and GNU Common Lisp Document)

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#### 12.2.25 + [Function]

`+` &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::

Numeric Operations, Rational Computations, Floating-point Computations, Complex Computations