Coursera Flash Sale
40% Off Coursera Plus for 3 Months!
Grab it
Get fluent in SQLite by solving 81 exercises. And then level up with mentoring from our world-class team.
Power BI Fundamentals - Create visualizations and dashboards from scratch
Start speaking a new language. It’s just 3 weeks away.
Overview
Syllabus
- Hello World
- Exercism's classic introductory exercise. Just say "Hello, World!".
- Two-Fer
- Create a sentence of the form "One for X, one for me.".
- Bottle Song
- Produce the lyrics to the popular children's repetitive song: Ten Green Bottles.
- Darts
- Calculate the points scored in a single toss of a Darts game.
- Difference of Squares
- Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
- Gigasecond
- Given a moment, determine the moment that would be after a gigasecond has passed.
- Grains
- Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.
- ISBN Verifier
- Check if a given string is a valid ISBN-10 number.
- Leap
- Determine whether a given year is a leap year.
- Pangram
- Determine if a sentence is a pangram.
- Raindrops
- Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.
- Resistor Color
- Convert a resistor band's color to its numeric representation.
- Resistor Color Duo
- Convert color codes, as used on resistors, to a numeric value.
- RNA Transcription
- Given a DNA strand, return its RNA complement.
- Space Age
- Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.
- Triangle
- Determine if a triangle is equilateral, isosceles, or scalene.
- Allergies
- Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.
- Bob
- Bob is a lackadaisical teenager. In conversation, his responses are very limited.
- Clock
- Implement a clock that handles times without dates.
- D&D Character
- Randomly generate Dungeons & Dragons characters.
- Eliud's Eggs
- Help Eliud count the number of eggs in her chicken coop by counting the number of 1 bits in a binary representation.
- ETL
- Change the data format for scoring a game to more easily add other languages.
- Flatten Array
- Take a nested list and return a single list with all values except nil/null.
- Grade School
- Given students' names along with the grade that they are in, create a roster for the school.
- House
- Output the nursery rhyme 'This is the House that Jack Built'.
- Kindergarten Garden
- Given a diagram, determine which plants each child in the kindergarten class is responsible for.
- Matrix
- Given a string representing a matrix of numbers, return the rows and columns of that matrix.
- Meetup
- Calculate the date of meetups.
- Nucleotide Count
- Given a DNA string, compute how many times each nucleotide occurs in the string.
- Perfect Numbers
- Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.
- Queen Attack
- Given the position of two queens on a chess board, indicate whether or not they are positioned so that they can attack each other.
- Resistor Color Trio
- Convert color codes, as used on resistors, to a human-readable label.
- Secret Handshake
- Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.
- Square Root
- Given a natural radicand, return its square root.
- Sum of Multiples
- Given a number, find the sum of all the multiples of particular numbers up to but not including that number.
- Swift Scheduling
- Convert delivery date descriptions to actual delivery dates.
- Twelve Days
- Output the lyrics to 'The Twelve Days of Christmas'.
- Acronym
- Convert a long phrase to its acronym.
- All Your Base
- Convert a number, represented as a sequence of digits in one base, to any other base.
- Anagram
- Given a word and a list of possible anagrams, select the correct sublist.
- Armstrong Numbers
- Determine if a number is an Armstrong number.
- Atbash Cipher
- Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.
- Binary Search
- Implement a binary search algorithm.
- Bowling
- Score a bowling game.
- Collatz Conjecture
- Calculate the number of steps to reach 1 using the Collatz conjecture.
- Crypto Square
- Implement the classic method for composing secret messages called a square code.
- Diamond
- Given a letter, print a diamond starting with 'A' with the supplied letter at the widest point.
- Food Chain
- Generate the lyrics of the song 'I Know an Old Lady Who Swallowed a Fly'.
- Hamming
- Calculate the Hamming distance between two DNA strands.
- High Scores
- Manage a player's High Score list.
- Isogram
- Determine if a word or phrase is an isogram.
- Largest Series Product
- Given a string of digits, calculate the largest product for a contiguous substring of digits of length n.
- Luhn
- Given a number determine whether or not it is valid per the Luhn formula.
- Matching Brackets
- Make sure the brackets and braces all match.
- OCR Numbers
- Given a 3 x 4 grid of pipes, underscores, and spaces, determine which number is represented, or whether it is garbled.
- Pascal's Triangle
- Compute Pascal's triangle up to a given number of rows.
- Phone Number
- Clean up user-entered phone numbers so that they can be sent SMS messages.
- Pig Latin
- Implement a program that translates from English to Pig Latin.
- Poker
- Pick the best hand(s) from a list of poker hands.
- Protein Translation
- Translate RNA sequences into proteins.
- Proverb
- For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.
- Rail Fence Cipher
- Implement encoding and decoding for the rail fence cipher.
- REST API
- Implement a RESTful API for tracking IOUs.
- Reverse String
- Reverse a given string.
- Robot Simulator
- Write a robot simulator.
- Roman Numerals
- Convert modern Arabic numbers into Roman numerals.
- Rotational Cipher
- Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.
- Run-Length Encoding
- Implement run-length encoding and decoding.
- Saddle Points
- Detect saddle points in a matrix.
- Say
- Given a number from 0 to 999,999,999,999, spell out that number in English.
- Scrabble Score
- Given a word, compute the Scrabble score for that word.
- Series
- Given a string of digits, output all the contiguous substrings of length `n` in that string.
- Sieve
- Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.
- State of Tic-Tac-Toe
- Determine the game state of a match of Tic-Tac-Toe.
- Sublist
- Write a function to determine if a list is a sublist of another list.
- Tournament
- Tally the results of a small football competition.
- Transpose
- Take input text and output it transposed.
- Word Count
- Given a phrase, count the occurrences of each word in that phrase.
- Wordy
- Parse and evaluate simple math word problems returning the answer as an integer.
- Yacht
- Score a single throw of dice in the game Yacht.
- Line up
- Help lining up customers at Yaʻqūb's Deli.
