Solved: how to add lists

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Haskell is a standardized, general-purpose purely functional programming language, with non-strict semantics and strong static typing. It is named after logician Haskell Curry.

Haskell List is a homogenous data type that is a collection of elements, which are of the same type. Lists play a major role in Haskell, as they are the most commonly used data structure.

In Haskell you can combine lists by using the ++ operator. For instance, you might use a code snippet as follows:

main = print (([1,2,3] ++ [4,5,6]))
-- Output: [1,2,3,4,5,6]

Why Use Haskell?

Haskell offers a variety of features that make it widely popular amongst programmers. It provides a high level of abstraction using concepts from category theory. Functions are first class values in Haskell. They can be stored in data structures, passed as arguments to functions, and returned as results from functions.

Haskell also supports lazy evaluation. This means that the computation of a function’s result is delayed until the result is actually needed. This can be used to write very modular code, as well as to define potentially infinite data structures.

How to Combine Lists in Haskell

Combining lists in Haskell can be achieved using the ++ operator. The ++ operator takes two lists as its operands. It creates a new list that contains the elements of the first list followed by the elements of the second list.

main = print (([1,2,3] ++ [4,5,6]))
-- Output: [1,2,3,4,5,6]

In this example, the list [1,2,3] is combined with the list [4,5,6] to form a new list [1,2,3,4,5,6].

You can also use the concat function to combine a list of lists into one list.

main = print ((concat [[1,2,3],[4,5,6]]))
-- output: [1,2,3,4,5,6]

What Are The Benefits of Using Lists in Haskell

Lists in Haskell offer several benefits. They are homogenous, meaning all elements must be the same type. This ensures strong typing and avoids a common class of bugs found in other programming languages. Lists in Haskell are also lazily evaluated, which means elements are only computed as they are needed.

Moreover, Haskell lists are very flexible and can be manipulated in many ways to suit the requirements of the program. They can be infinitely long, defined recursively, and include many powerful built-in operations for combining and manipulating them.

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