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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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| 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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