Question

In Google Apps Scripts, how do you display simple output to a user? Maybe one line of boilerplate text and a variable, like "this script will process row: 3." In javascript, you'd use the alert() function, I think. Does Google Apps have an equivalent? In case it helps, I found this video about how to collect simple input from a user: http://www.youtube.com/watch?v=5VmEPo6Rkq4