Modules are a bunch of functions regrouped in a single file, under a single name. Additionally, all functions in Erlang must be defined in modules.
Most computer programming languages support recursion by allowing a function to call itself within the program text.
In mathematics and computer science, a higher-order function (also functional form, functional or functor) is a function that does at least one of the following: takes one or more functions as an input.
Erlang was developed at Ericsson and was designed from the ground up for writing scalable, fault-tolerant, distributed, non-stop, soft-realtime applications.
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