readline(prompt="")
prompt
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the string printed when prompting the user for input.
Should usually end with a space " " .
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readline
reads a line from the terminal, returning it as a
character string.fun <- function() { ANSWER <- readline("Are you a satisfied R user? ") if (substr(ANSWER, 1, 1) == "n") cat("This is impossible. YOU LIED!\n") else cat("I knew it.\n") } fun()