Different OOP systems

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• Java - Hello World needs a class, but numbers and strings by themselves are not objects.
• Python - Even strings and numbers are objects, but you can just write a single line to print.

examples/hello_world.py

print("Hello World")

examples/HelloWorld.java

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello World");
    }
}

"abc".upper()