well if you run what V360 said it ask you What is your name your type your name because it asked you to so now that your name in a valuable it reply hello and add your name you just typed to the print string!
The INPUT command takes input from the keyboard, so you can type your name.
The PRINT command puts text on the screen. ; is used to put multiple strings together (this is only for the print command. to add strings together in other commands, use +)
