# + [*Relation*]

# - [*Relation*]

# * [*Relation*]

# / [*Relation*]

## Purpose

The **+**, **-**, *****, and **/** relations are functions used for performing arithmetic operations.

## Syntax

**+** *number1 number2 number3*

**-** *number1 number2 number3*

***** *number1 number2 number3*

**/** *number1 number2 number3*

## Domains

The *number1* and *number2* arguments are the integer or real numbers to be added, subtracted, multiplied, or divided.

## Range

The *number3* argument is the integer or real result.

## Examples

(tellm (:about Joe Man (age 45) (wife Sue)) (age Sue 20))
(ask (- (age Joe) (age Sue) 25)) ==> T
(retrieve ?x (:and (Man ?x) (> (age ?x) (* (age (wife ?x)) 2)))) ==>
(|I|JOE)

## See Also

Last modified: Jun 1 1995