tell application "Finder"

    display dialog "Hello World"

end tell

set theString to "Hello World"

tell application "Finder"

    display dialog theString

end tell

--Integer Variables

set theFirstNumber to

set the theSecondNumber to 

--Variable Operations

set theAnswer to (theFirstNumber + theSecondNumber)

set theAnswer to (theAnswer + )

--String Variables

set theString to "3+2+1="

--Display Dialog

tell application "Finder"

    display dialog theString & theAnswer

end tell