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C4.23. Examples from element documentation

Examples below are taken from the documentation page for PrairieLearn Elements in question.html .

Submission Elements

pl-multiple-choice

Example of a multiple choice element.

Correct Input: negative

(a)

negative

(b)

positive

(c)

zero

pl-checkbox

Example of a multiple selection element.

Correct Input: A-B, B-C, and D-E.

(a)

E-F

(b)

A-B

(c)

C-D

(d)

D-E

(e)

F-G

(f)

B-C

Select all possible options that apply.

pl-number-input

Example of a fill in the blank element that accepts numeric values.

Correct Input: 1.339713339197286

$x =$

Correct Input: 1.34

$x =$

pl-integer-input

Example of a fill in the blank element that accepts integer values.

Correct Input: 42

$y =$

pl-symbolic-input

Example of a fill in the blank element that accepts mathematical expression values.

Correct Input: x + y + 1

$z =$

pl-string-input

Example of a fill in the blank element that accepts string values.

Correct Input: Learn

Prairie

pl-matrix-component-input

Example of a fill in the blank element that provides input fields for each entry of a matrix.

Correct Input:

1 in location 1x1
2 in location 1x2
3 in location 2x1
4 in location 2x2

$A=$

pl-matrix-input

Example of a fill in the blank element that provides an input field for supplying the underlying code required to create the matrix.

Correct Input:

MATLAB: [1 2; 3 4]
Python: [[1, 2], [3, 4]]

$B=$

pl-file-editor

Example of an inbrowser code file editor submission element.

fib.py

pl-file-upload

Example of a file submission element.

Correct Input: foo.py, bar.c, and filename with, comma.txt

Files

Decorative Elements

pl-code

Example of embedding code blocks with syntax highlighting.

def square(x):
    return x * x

pl-figure

Example of displaying an image in a question.

pl-file-download

Example of providing a file download option.

data.txt

pl-variable-output

Example of displaying matrices using a code export.

C = [5.000 6.000; 7.000 8.000];
D = [-1.000 4.000; 3.000 2.000];

Cm = {{5, 6}, {7, 8}};
Dm = {{-1,  4}, { 3,  2}};

import numpy as np

C = np.array([[5, 6], [7, 8]])
D = np.array([[-1,  4], [ 3,  2]])

C = matrix(c(5, 6, 7, 8), nrow = 2, ncol = 2, byrow = TRUE)
D = matrix(c(-1,  4,  3,  2), nrow = 2, ncol = 2, byrow = TRUE)

from sympy import *

C = Matrix([[5, 6], [7, 8]])
D = Matrix([[-1,  4], [ 3,  2]])

pl-matrix-latex

Example of displaying a matrix using latex.

$C = \begin{bmatrix} 5 & 6\\ 7 & 8\\\end{bmatrix}$

pl-graph

Example of a graphviz visualization.

pl-python-variable

Displaying contents of a Python dictionary.

1	{'a': 1, 'b': 2, 'c': 3}

pl-dataframe

Displaying contents of a Pandas DataFrame from Python.

	col1	col2
0	1	3
1	2	4

2 rows x 2 columns

pl-overlay

What is the length of the hypotenuse?

$$3$$

Additional attempts available with new variants

Collection 4

Assessment overview

Total points:	0/360
Score:	0%

Question C4.23

Value:	2
All variants: Open (current)
Total points:	— /10
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Staff information

Student details

Dev User

dev@example.com

Question

QID:

element/codeDocumentation

Title:

Examples from element documentation

Variant

Started at:

2026-08-04 16:37:23 (CDT)

Duration:

Show/Hide answer

{
  "c": 4.242640687119285,
  "acc": {
    "key": "a",
    "html": "negative",
    "score": 1,
    "feedback": null
  },
  "vpos": [
    {
      "key": "b",
      "html": "A-B",
      "feedback": null
    },
    {
      "key": "d",
      "html": "D-E",
      "feedback": null
    },
    {
      "key": "f",
      "html": "B-C",
      "feedback": null
    }
  ],
  "ans_sig": 1.34,
  "matrixA": {
    "_type": "ndarray",
    "_dtype": "int64",
    "_value": [
      [
        1,
        2
      ],
      [
        3,
        4
      ]
    ]
  },
  "matrixB": {
    "_type": "ndarray",
    "_dtype": "int64",
    "_value": [
      [
        1,
        2
      ],
      [
        3,
        4
      ]
    ]
  },
  "ans_rtol": 1.339713339197286,
  "int_value": 42,
  "string_value": "Learn",
  "symbolic_math": {
    "_type": "sympy",
    "_value": "x + y + 1",
    "_variables": [
      "x",
      "y"
    ],
    "_assumptions": {
      "x": {
        "commutative": true
      },
      "y": {
        "commutative": true
      }
    },
    "_custom_functions": []
  }
}

Assessment instance

Assessment:

gallery/elements