Language
========

.. post:: Dec 30, 2020
   :tags: scala

- def: defines an immutable label for the right side content which is lazily evaluated - evaluate by name.

- val: defines an immutable label for the right side content which is eagerly/immediately evaluated - evaluated by value.

- var: defines a mutable variable, initially set to the evaluated right side content.

https://stackoverflow.com/a/33066906/1589512

Execution
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left to right
call-by-value
call-by-name
call-by-need