In powershell console there are a few ways to make a new line
A. Shift + Enter : Use this at any point to make a new line
B. The opening of a string " or ' until the closing of the string " or ' : use this when you have a string that you wish to span many lines
C. A pipe | : Use this if you have output that you would like to pass to another command
D. The Back tick (escape char) ` : use this to separate lines for a new command or splitting a command into other lines
If you are new to powershell, I would suggest using Powershell ISE. If its installed you can go to the powershell console and type ISE or go to start and type Powershell ISE. This will be a good place to run scripts and debug as you can add breakpoints to your scripts.