In a Select Output exercise, students are asked to select the output generated
by a given block of code. Select Output exercises require an output block
(because the output block is the correct solution), and a
field. In a sense, Select Output is the reverse of a Select
Code exercise. In fact, all it takes to convert a Select Code
exercise to a Select Output exercise is to remove or comment the
distractor_code field and add a
# subtraction - key: # generate me! context: "You can use `-` to subtract numbers, just like a calculator." output: "3" code: "print(8 - 5)" distractor_output: - option: "4" feedback: "8 - 5 isn't 4, try again." - option: "8 - 5" feedback: "The mathematical expression will be evaluated before it is printed."