Discuss the concept of higher-order functions and their applications in Haskell.

Higher-order functions are a fundamental concept in functional programming, and they play a significant role in Haskell. In Haskell, functions are treated as first-class citizens, which means they can be passed as arguments to other functions, returned as results, and stored in data structures. This ability to work with functions in a flexible and modular manner is facilitated by higher-order functions. Let's delve deeper into the concept of higher-order functions and explore their applications in Haskell. Higher-order functions in Haskell: In Haskell, a higher-order function is a function that either takes one or more functions as arguments or returns a function as its result. This characteristic sets Haskell apart from languages that treat functions as basic constructs without the ability to manipulate them freely. In Haskell, higher-order functions allow for powerful abstractions and enable expressive and concise programming. Applications of higher-order functions in Haskell: 1. Function comp....