ask: Display a prompt and collect the user's response

In gtools: Various R Programming Tools

Display a prompt and collect the user's response

Description

Display a prompt and collect the user's response

Usage

ask(msg = "Press <RETURN> to continue: ", con = stdin())

Arguments

msg	Character vector providing the message to be displayed
con	Character connection to query, defaults to stdin().

Details

The prompt message will be displayed, and then readLines is used to collect a single input value (possibly empty), which is then returned.

In most situations using the default con=stdin() should work properly. Under RStudio, it is necessary to specify con=file("stdin") for proper operation.

Value

A character scalar containing the input provided by the user.

Author(s)

Gregory R. Warnes [e-mail]

See Also

readLines, scan

Examples

# use default prompt
ask()

silly <- function() {
  age <- ask("How old aroe you? ")
  age <- as.numeric(age)
  cat("In 10 years you will be", age + 10, "years old!\n")
}

gtools documentation built on Nov. 20, 2023, 5:07 p.m.