[ top | up ]

Menu Interaction Function

Usage

menu(x)

Arguments

x a character vector of choices

Description

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'.

Value

The number corresponding to the selected item, or 0 if no choice was made.

Examples

switch(menu(c("List letters", "List LETTERS")) + 1,
       cat("Nothing done\n"), letters, LETTERS)