Category: Haskell

Preface Haskell is a programming language function (functional programming) and lazy (lazy):))) (we’ll find out later) was created in 1980 by a panel of academics. There were also a number of functional programming languages ​​in those days, but everyone had a different idea. So they eventually got together and built a new programming language with […]

Preface We will learn about the basic Haskell operators, most of which are similar to common programming languages. Comment Is not compiled part, just to make notes for coder easy to understand. To comment on a line, we put 2 signs – front. n :: Int n = 3 — n = 5 And to […]

Preface There is a saying about these two concepts: imperative programming (Imperative programming) emphasis on what we do how, and declarative programming (Declarative programming) emphasize what we do what. Can take a practical example as follows, a couple comes to the restaurant, the waiter wants to ask where they sit, they will answer: Command direction […]

Preface Note: This section explains how to install Haskell version 8.10.1 on Windows 10. Newer versions or other operating systems may have other ways to install. Haskell has 3 installers Minimal Installers, Stack and Haskell Platform. We will install the Haskell Platform. We must use the Powershell under Administrator on Windows to install it. To […]

Preface In the previous section we installed GHCI and used it in the Command Prompt. In this section we will use Visual Studio Code as the IDE to be able to write and manage code easier. VS Code First we download and install VS Code at https://code.visualstudio.com/. Install Extension on VS Code We install the […]

Preface In this section we will learn the data types available in Haskell. Declare the type First we must know how to declare the data type for a variable. The declaration syntax is: <variable name> :: <type_name> For example: main :: IO() a :: Int b :: Bool main = return() The basic styles Haskell […]

Preface The branch statement in Haskell is quite simple and similar to most other languages. The syntax is: if <expression> then <Commands> else if <expression> then <Commands> … else <Commands> For example: main :: IO () main = do     let v = 10     if v `rem` 2 == 0 then putStrLn “Even number”     else putStrLn “Odd number”    […]

Preface You may not know it, but since the first part up until now we’ve been using functions (Function). For example, the * sign is a function to multiply 2 numbers, and we put the 2 numbers to be multiplied on the left and right of the *. However, most functions that do not take […]