system.out.println()?

Answer 1

the is the code you use to have the computer say what you wont down in the console area. so to test it try this:
System.out.println("hello world");
and it should print out hello world. hope that helped you :)

Answer 2

note that it is "System" starting with capital letter. you also can print the value of variable that you have declared befor .
Int a=200;
System.out.println("hello world"+a);
output hello world200