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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"> | |
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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 | |
87 | </pre></div> | |
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