Java Lesson 1: 'Hello World' (codecademy)

javac Filename.java

compiles the code

curly braces {}

define the scope of our classes and methods

java Filename

executes a .class file

semicolons

mark the end of a statement

/ asterick and asterick /

multi-line comments

System.out.println()

prints output followed by a new line

System.out.print()

prints output without a new line

class

represents one real-world idea

main()

runs the tasks of the program

//

short comments

out

short for 'output'

println

short for 'print line'

whitespace

used for humans to read code easily