Explaining how to implement an efficient spell checker using q-grams. Promo code (35% off): au35cut Please support this channel by purchasing "Grokking Algorithms, Second Edition" using the above link. You can also purchase any book from using the 35% discount promo code and this link: Github link for source code: Q-grams are used for approximate String Matching, fuzzy Text Search, and String Distance Functions. In this video we show how we can use them to build a simple spellcheker with suggestions.