**General:**This frame introduces
you to simple numbers in * Glee*. Numbers may be integer or floating
(containing decimals). They may be supplied in normal or scientific notation.
All numbers in

**Scalar operation:** A simple
operation between two scalars (in this case "`1`" and
"`2`" operated on by "`+`") yields a scalar
"`3`". "`1+2=3`".

**Floating point:**
* Glee* wants to let its users view numbers as numbers. The user
shouldn't have to be concerned with integers and floating point numbers
(numbers called floats which contain decimals). But the computer deals with
these kinds of numbers differently and

**Signed numbers:**Numeric
operations can produce results less than zero. You're probably used to seeing
these displayed with a dash ("`-`"). For reasons I'll soon
discuss, this isn't good for * Glee* or for you.

**Entering signs:** If you
need to enter a negative number, you use the underbar "_".
* Glee* doesn't allow any spaces between the underbar and the first
digit. Here we see vividly why

**Monadic operations:** The dash
"-" with something on its left and nothing on its right is called the
"negate" operator. It is a "monadic" operator ... has only
one argument. Contrast this with "`1-2`" (read `1`
minus` 2`). Then the dash is a "dyadic" operator called
"minus". It has arguments on both sides (`1` on the left and
`2` on the right).

**Consecutive operators:**
Here we have "`1`"; then "`-`" (which yields
negative `1`); then another "`-`" (which negates that
negative `1 `yielding positive `1`). * Glee*, working
from left to right is not concerned. Its rules are very simple. Take what is on
the left and right and operate on them. If what is on the right is not an
operand (e.g. in this case it is an operator), then do the monadic operation
working just with the left. Then proceed to the right with the result.

**Consecutive Operations
proceeding:** * Glee* picks up the "