2014-08-03 19:52:23 +02:00
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ENV
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---
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2019-11-11 23:01:05 +01:00
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Operator to read environment variables.
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2014-08-03 19:52:23 +02:00
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2018-10-28 12:09:07 +01:00
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Use the syntax ``$ENV{VAR}`` to read environment variable ``VAR``.
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2019-11-11 23:01:05 +01:00
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To test whether an environment variable is defined, use the signature
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``if(DEFINED ENV{<name>})`` of the :command:`if` command.
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See the :command:`set` and :command:`unset` commands to see how to
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write or remove environment variables.
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