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| <a name="Symbol-Names"></a> |
| <h4 class="subsection">3.10.3 Symbol Names</h4> |
| <a name="index-symbol-names"></a> |
| <a name="index-names"></a> |
| <a name="index-quoted-symbol-names"></a> |
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| <p>Unless quoted, symbol names start with a letter, underscore, or period |
| and may include letters, digits, underscores, periods, and hyphens. |
| Unquoted symbol names must not conflict with any keywords. You can |
| specify a symbol which contains odd characters or has the same name as a |
| keyword by surrounding the symbol name in double quotes: |
| </p><div class="smallexample"> |
| <pre class="smallexample">"SECTION" = 9; |
| "with a space" = "also with a space" + 10; |
| </pre></div> |
| |
| <p>Since symbols can contain many non-alphabetic characters, it is safest |
| to delimit symbols with spaces. For example, ‘<samp>A-B</samp>’ is one symbol, |
| whereas ‘<samp>A - B</samp>’ is an expression involving subtraction. |
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