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git-svn-id: https://svn.eiffel.com/eiffel-org/trunk@2327 abb3cda0-5349-4a8f-a601-0c33ac3a8c38
23 lines
1.7 KiB
Plaintext
23 lines
1.7 KiB
Plaintext
[[Property:modification_date|Fri, 19 Mar 2021 14:23:47 GMT]]
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[[Property:publication_date|Mon, 10 Sep 2018 09:09:25 GMT]]
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[[Property:uuid|B74D374E-895C-4F22-B95F-656BD78ECD03]]
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[[Property:weight|1000]]
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[[Property:title|Getting a STRING from a NUMERIC object]]
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[[Property:link_title|NUMERIC to STRING]]
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== <code lang="eiffel">NUMERIC</code> to <code lang="eiffel">STRING</code> ==
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Every class has the <code lang="eiffel">out</code> method that can be used to get a text version of the object. For a lot of classes, this method returns internal information that is not really useful for the end user. But for every <code lang="eiffel">NUMERIC</code> class, the <code lang="eiffel">out</code> method returns a text representation of the number that the <code lang="eiffel">NUMERIC</code> object represents.
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<code>
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print_integer (a_integer: INTEGER)
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-- Print the value of `a_integer`.
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do
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print (a_integer.out + "%N")
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end
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</code>
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Note that for more advanced conversion, you can also use a conversion class like <code lang="eiffel">FORMAT_DOUBLE</code>.
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== <code lang="eiffel">STRING</code> to <code lang="eiffel">NUMERIC</code> ==
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The reverse conversion is available for all standard numeric types (<code lang="eiffel">INTEGER_8</code>, <code lang="eiffel">INTEGER_16</code>, etc.) using the features <code lang="eiffel">to_integer_8</code>, <code lang="eiffel">to_integer_16</code>, etc. of class <code lang="eiffel">STRING</code>. The string should contain a valid string representation of the corresponding numeric value. This can be checked by calling <code lang="eiffel">is_integer_8</code>, <code lang="eiffel">is_integer_16</code>, etc. before calling the conversion functions. |