It allows you to open the /etc/passwd file and read each line one at a time, cutting out just the first field in the file and then printing that line.

If instead the preceding code did not contain line 2 and if you used a second button with an Open page simple action to go to page2, the computed field would come back empty.

Three open star clusters, Charles Messier's M36, M37, and M38 line up in the dense star field above and left of Elnath, familiar to many binocular-equiped skygazers.