Hello World

How to make "Hello World" in different programming languages.

A lot of them must be compiled before run, short instructions for MacOS below (tested on 10.15.7 / Catalina).

1. Assembly (.asm)
   • nasm -fmacho64 hello.asm
   • ld -macosx_version_min 10.7.0 -lSystem -o hello hello.o
   • ./hello
2. C (.c)
   • gcc hello.c
   • ./a.out
3. C++ (.cpp)
   • g++ hello.cpp -o hello
   • ./hello
4. Cobol (.cbl)
   • brew instal gnu-cobol
   • pip3 install OpenCobolIDE --upgrade (optional)
   • brew install PyQt5 (optional)
   • OpenCobolIDE
   • now you have graphic compiler and you can create new cobol file
   • best tutorial (in my opinion): https://www.globalnerdy.com/2020/04/15/a-quick-and-dirty-guide-to-installing-a-cobol-compiler-and-ide-on-macos-and-get-a-cobol-book-at-a-discount/
5. C# (.cs)
   • brew install mono
   • mcs hello.cs
   • mono hello.exe
6. Erlang (.erl)
   • brew install erlang
   • erl hello.erl (to open Erlang console)
   • io:fwrite("Hello from Erlang\n").
7. Elixir (.ex)
   • brew install elixir
   • elixir hello.ex
8. Golang (.go)
   • go run hello.go
9. Haskell (.hs)
   • brew install ghc
   • ghc -o hello hello.hs
   • ghc hello.hs
   • ./hello
10. Java (.java)
    • javac hello.java
    • java hello
11. Kotlin (.kt)
    • kotlinc hello.kt -d kotlin.jar
    • java -jar kotlin.jar
12. PHP (.php)
    • php hello.php
13. Perl (.pl)
    • perl hello.pl
14. Python (.py)
    • python hello.py
15. Ruby (.rb)
    • ruby hello.rb
16. Rust (.rs)
    • rustc hello.rs
    • ./hello
17. Scala (.sc)
    • scalac hello.scala
    • scala hello
18. Bash (.sh)
    • sh hello.sh
19. Swift (.swift)
    • swift
    • print ("Hello from Swift ")