projects / OpenSPARC-T2-SAM / blame
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| 53 | ||
| 54 | <H2><A NAME="SECTION004460000000000000000"></A><A NAME="imaginary"></A> | |
| 55 | <BR> | |
| 56 | 2.4.6 Imaginary literals | |
| 57 | </H2> | |
| 58 | ||
| 59 | <P> | |
| 60 | Imaginary literals are described by the following lexical definitions: | |
| 61 | ||
| 62 | <P> | |
| 63 | <dl><dd class="grammar"> | |
| 64 | <div class="productions"> | |
| 65 | <table> | |
| 66 | <tr> | |
| 67 | <td><a id='tok-imagnumber' xml:id='tok-imagnumber'>imagnumber</a></td> | |
| 68 | <td>::=</td> | |
| 69 | <td>(<a class='grammartoken' href="floating.html#tok-floatnumber">floatnumber</a> | <a class='grammartoken' href="floating.html#tok-intpart">intpart</a>) ("j" | "J")</td></tr> | |
| 70 | </table> | |
| 71 | </div> | |
| 72 | <a class="grammar-footer" | |
| 73 | href="grammar.txt" type="text/plain" | |
| 74 | >Download entire grammar as text.</a> | |
| 75 | </dd></dl> | |
| 76 | ||
| 77 | <P> | |
| 78 | An imaginary literal yields a complex number with a real part of | |
| 79 | 0.0. Complex numbers are represented as a pair of floating point | |
| 80 | numbers and have the same restrictions on their range. To create a | |
| 81 | complex number with a nonzero real part, add a floating point number | |
| 82 | to it, e.g., <code>(3+4j)</code>. Some examples of imaginary literals: | |
| 83 | ||
| 84 | <P> | |
| 85 | <div class="verbatim"><pre> | |
| 86 | 3.14j 10.j 10j .001j 1e100j 3.14e-10j | |
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| 125 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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