Haskell Program to print hello world

Program

main = putStrLn "Hello World!!!"

This simple Haskell program prints "Hello World!!!" to the console using the putStrLn function.

1. main Function

   • In Haskell, main is the entry point of the program.
   • It executes when the program runs.

2. putStrLn Function

   • putStrLn is used to print a string followed by a newline.
   • "Hello World!!!" is passed as an argument, so it gets printed to the screen.

Key Takeaways

• Haskell is a functional programming language, and everything revolves around expressions.
• putStrLn is used instead of print (common in imperative languages).
• The main function acts as the program's starting point.

Output

$ ghc -o hello-world hello-world.hs 
[1 of 1] Compiling Main             ( hello-world.hs, hello-world.o )
Linking hello-world ...
$ ./hello-world 
Hello World!!!