eiffel-org/documentation/21.11/eiffel/Examples/example-environment-variables.wiki

[[Property:title|Example: Environment variables]]
[[Property:weight|0]]
[[Property:uuid|60c39a34-0794-4c1f-a150-7431afa3e693]]
==Description==

Using features from the class <code>EXECUTION_ENVIRONMENT</code> to create and retrieve an environment variable.

==Notes==

The <code>make</code> procedure of the class <code>APPLICATION</code> below uses the features <code>put</code> and <code>get</code>, inherited from the class <code>EXECUTION_ENVIRONMENT</code>, to create the environment variable <code>MY_VARIABLE</code> with value "Hello World!", and then to retrieve the value by key and print it.

==Solution==

<code>
class
    APPLICATION

inherit
    EXECUTION_ENVIRONMENT

create
    make

feature {NONE} -- Initialization
    make
            -- Create and retrieve an environment variable.
        do
            put ("Hello World!", "MY_VARIABLE")
            print (get ("MY_VARIABLE"))
        end
end
</code>


==Output==

<code lang="text">
Hello World!
</code>