HTML and CSS Reference
In-Depth Information
Number Values
A number value is expressed as a positive or negative number (when permitted). Numbers can
be either real (represented as
<number>
) or integers (
<integer>
). They may also restrict the
range of acceptable values, as with color values that accept only integers in the range 0-255.
A more common range restriction is to limit a number to be non-negative. These are some-
times represented as
<non-negative number>
or
<non-negative integer>
.
