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Higher Order Function in Erlang.

erlang Functional Programming  OTP 
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  1. Higher Order Function in Erlang

  2. 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.

    An important part of all functional programming languages is the ability to take a function you defined and then pass it as a parameter to another function. This in turn binds that function parameter to a variable which can be used like any other variable within the function.

     A function that can accept other functions transported around that way is named a higher order function. Higher order functions are a powerful means of abstraction and one of the best tools to master in Erlang.

    For example-

    one() -> 1.
    two() -> 2.
    add(X,Y) -> X() + Y().
    functions:add(fun functions:one/0,fun functions:two/0).   // function call


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