| menu {base} | R Documentation |
menu presents the user with a menu of choices labelled from 1
to the number of choices. To exit without choosing an item one can
select ‘0’.
menu(x)
x |
a character vector of choices |
The number corresponding to the selected item, or 0 if no choice was made.
switch(menu(c("List letters", "List LETTERS")) + 1,
cat("Nothing done\n"), letters, LETTERS)