Using here-strings
Until now, you have only seen single-line strings in this book. PowerShell has a so-called here-string that spans multiple lines. You use @" or @' to start the here-string and "@ or '@ to finish the here-string. The @" or @' must be at the end of a line and the "@ or '@ must be at the beginning of the line that terminates the here-string. As in single-line strings, variables and subexpressions are expanded in double-quoted here-strings and are not expanded in single-quoted here-strings.
The following command creates a here-string that spans two lines and puts the here-string in the $s variable:
PowerCLI C:\> $s = @" >> Learning PowerCLI >> is a lot of fun! >> "@ >> $s >> Learning PowerCLI is a lot of fun!