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JavaScript Math.min and Math.max — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript Math.min and Math.max lesson. Every one is checked automatically in the browser — write the code, run it, and the tests tell you what still fails.

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Exercises(5)

  1. 1

    Find the largest of three

    easy10 min

    Report the biggest of five, two and nine.

  2. 2

    Find the largest in an array

    easy10 min

    Spread the scores to find the highest.

  3. 3

    Find the smallest in an array

    easy10 min

    Spread the scores to find the lowest.

  4. 4

    Clamp a value

    easy10 min

    Keep 150 inside the range zero to one hundred.

  5. 5

    Guard an empty array

    medium10 min

    Report a message rather than spreading an empty array.

Find the bug(5)

  1. 1

    Fix the array passed directly

    easy8 min

    Math.max takes separate arguments, not an array.

  2. 2

    Fix min used where max belongs

    easy8 min

    The highest score is wanted, not the lowest.

  3. 3

    Fix the clamp the wrong way round

    easy8 min

    With the calls swapped a value below the range comes back as the maximum.

  4. 4

    Fix the unguarded empty array

    easy8 min

    Spreading an empty array gives -Infinity from max.

  5. 5

    Fix sort used to find the largest

    easy8 min

    The default sort compares as text, so it puts 91 last rather than 100.

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