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55 | <H1><A NAME="SECTION007100000000000000000"></A><A NAME="conversions"></A> | |
56 | <BR> | |
57 | 5.1 Arithmetic conversions | |
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59 | <a id='l2h-331' xml:id='l2h-331'></a> | |
60 | <P> | |
61 | When a description of an arithmetic operator below uses the phrase | |
62 | ``the numeric arguments are converted to a common type,'' the | |
63 | arguments are coerced using the coercion rules listed at the end of | |
64 | chapter <A href="datamodel.html#datamodel">3</A>. If both arguments are standard numeric | |
65 | types, the following coercions are applied: | |
66 | ||
67 | <P> | |
68 | ||
69 | <UL> | |
70 | <LI>If either argument is a complex number, the other is converted | |
71 | to complex; | |
72 | </LI> | |
73 | <LI>otherwise, if either argument is a floating point number, | |
74 | the other is converted to floating point; | |
75 | </LI> | |
76 | <LI>otherwise, if either argument is a long integer, | |
77 | the other is converted to long integer; | |
78 | </LI> | |
79 | <LI>otherwise, both must be plain integers and no conversion | |
80 | is necessary. | |
81 | </LI> | |
82 | </UL> | |
83 | ||
84 | <P> | |
85 | Some additional rules apply for certain operators (e.g., a string left | |
86 | argument to the `%' operator). Extensions can define their own | |
87 | coercions. | |
88 | ||
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125 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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