11-Recursion in Scheme
Recursion is an odd concept. It is where a function calls itself. Obviously, this creates a loop (the only kind of loop there is in functional programming). For this to work, there has to be a way out - the base case. We therefore create a function (which here is called rec-step) which contains the command to be repeated. After testing that that works we create another function which calls itself, rec-step and has at least one basecase (a way out). Once that has been tested and shown to work we can replace the call to rec-step with a lambda function so that all the code is in one place.
The code used in this video can be found via https://lyw4.life/Resources/scheme.php.
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