askYesNo
Ask a Yes/No Question
Description
Asks a yes/no question. Returns TRUE for yes, FALSE for no, and
NA if the operation is cancelled.
Usage
askYesNo(msg, default = TRUE,
prompts = getOption("askYesNo", gettext(c("Yes", "No", "Cancel"))), ...)
Arguments
| msg |
a character string. The message being asked.
Required.
|
| default |
the default value if no response is provided.
|
| prompts |
the allowed response values.
These values are partially matched and the case is ignored.
|
| ... |
currently ignored.
|
Details
The values of prompts are displayed after the msg,
with the default value of the prompt starting with upper-case characters.
The other prompt values are shown in lower case.
Value
returns a logical value or NA, depending on the response entered.
Examples
## Not run:
a <- askYesNo("Select one")
b <- askYesNo("Select one", default=FALSE) # FALSE if no response is entered
## End(Not run)