JavaScript Exercises - Fundamentals

This is a big collection of JavaScript exercises. Within each section, the exercises are roughly ordered from least to most difficult.

We recommend doing the first 3-5 exercises in each section before doing deeper in any single section.

If a particular concept isn't familiar to you, go read the relevant section in the JavaScript crash course.

Feedback

Remember, the goal is not to nail every exercise, but to create good opportunities for feedback. That means:

1. Devise a clear (but probably incomplete or mistaken) plan
2. Implement that plan in code as best you can
3. Get feedback from the computer, peers, and instructors
4. Revise plan and repeat

JavaScript Crash Course Sections

Here are some quick links to the different sections in the JavaScript crash course.

• JavaScript crash course homepage
• Numbers and Strings
• Variables
• Conditionals
• Arrays and Dictionaries
• Looping
• Functions

Numbers

1. isZero
2. isPositive
3. isNegative
4. isEven
5. isOdd
6. remainderOf
7. isMultipleOf
8. power
9. isPowerOf
10. isPowerOfTwo
11. isPerfectSquare
12. factors
13. isPrime
14. primeFactors
15. sumOfRange
16. factorial
17. celsiusToFahrenheit
18. fahrenheitToCelsius
19. fibonacci

Strings

1. countLetter
2. capitalize
3. longestWord
4. shortestWord
5. replaceCharacter
6. replaceCharacters
7. toLowercase
8. toUppercase
9. toSnakeCase
10. toTitleCase
11. rot13
12. rotN

Branching / Conditionals

1. daysInMonthByNumber
2. letterGrade
3. isValidTriangle
4. triangleType
5. rockPaperScissorsWinner

Patterns to Print

1. printSolidSquare
2. printSolidRightTriangle
3. printSolidPyramid
4. printHollowSquare
5. printHollowRightTriangle
6. printHollowPyramid
7. printInvertedSolidRightTriangle
8. printMultiplicationTable
9. printPlus

Arrays

1. largest
2. smallest
3. longest
4. shortest
5. sum
6. mean
7. median
8. product
9. includes
10. firstIndexOf
11. lastIndexOf
12. countEvens
13. countOdds
14. countGreaterThan
15. countLessThan
16. countValue
17. selectEvens
18. selectOdds
19. selectGreaterThan
20. selectLessThan
21. selectLongerThan
22. selectShorterThan
23. allPositive
24. anyPositive
25. concat
26. removeEmpty
27. removeElement
28. selectAboveMean