Number question

Creates a tutorial question asking the student to submit a number.

question_numeric(
  text,
  ...,
  correct = "Correct!",
  incorrect = "Incorrect",
  try_again = incorrect,
  allow_retry = FALSE,
  value = NULL,
  min = NA,
  max = NA,
  step = NA,
  options = list(),
  tolerance = 1.5e-08
)

Arguments

text: Question or option text
...: Answers created with answer() or answer_fn(), or extra parameters passed onto question().
correct: For question, text to print for a correct answer (defaults to "Correct!"). For answer, a boolean indicating whether this answer is correct.
incorrect: Text to print for an incorrect answer (defaults to "Incorrect") when allow_retry is FALSE.
try_again: Text to print for an incorrect answer (defaults to "Incorrect") when allow_retry is TRUE.
allow_retry: Allow retry for incorrect answers. Defaults to FALSE.
value: Initial value.
min: Minimum allowed value
max: Maximum allowed value
step: Interval to use when stepping between min and max
options: Extra options to be stored in the question object. This is useful when using custom question types. See sortable::question_rank() for an example question implementation that uses the options parameter.
tolerance: Submitted values within an absolute difference less than or equal to tolerance will be considered equal to the answer value. Note that this tolerance is for all answer() values. For more specific answer value grading, use answer_fn() to provide your own evaluation code.

Value

Returns a learnr question of type "learnr_numeric".

Examples

question_numeric(
  "What is pi rounded to 2 digits?",
  answer(3, message = "Don't forget to use the digits argument"),
  answer(3.1, message = "Too few digits"),
  answer(3.142, message = "Too many digits"),
  answer(3.14, correct = TRUE),
  allow_retry = TRUE,
  min = 3,
  max = 4,
  step = 0.01
)
#> Question: "What is pi rounded to 2 digits?"
#>   type: "learnr_numeric"
#>   allow_retry: TRUE
#>   random_answer_order: FALSE
#>   answers:
#>     X: "3"; "Don’t forget to use the digits argument"
#>     X: "3.1"; "Too few digits"
#>     X: "3.142"; "Too many digits"
#>     ✔: "3.14"
#>   messages:
#>     correct: "Correct!"
#>     incorrect: "Incorrect"
#>     try_again: "Incorrect"
#>   Options:
#>     min: 3
#>     max: 4
#>     step: 0.01
#>     tolerance: 1.5e-08 

question_numeric(
  "Can you think of an even number?",
  answer_fn(function(value) {
    if (value %% 2 == 0) {
      correct("even")
    } else if (value %% 2 == 1) {
      incorrect("odd")
    }
  }, label = "Is the number even?"),
  step = 1
)
#> Question: "Can you think of an even number?"
#>   type: "learnr_numeric"
#>   allow_retry: FALSE
#>   random_answer_order: FALSE
#>   answers:
#>     ?: "Is the number even?"
#>   messages:
#>     correct: "Correct!"
#>     incorrect: "Incorrect"
#>   Options:
#>     min: NA
#>     max: NA
#>     step: 1
#>     tolerance: 1.5e-08

Arguments

Value

See also

Examples