Dynamism

• But you wrote this code.

ui <- fluidPage(
  selectInput("choice", "A or B?", c("a", "b")),
  numericInput("a", "a", 0),
  numericInput("b", "b", 10),
  textOutput("out")
)

server <- function(input, output, session) {
  output$out <- renderText({
    if (input$choice == "a") {
      input$a
    } else {
      input$b
    }
  }) 
}