Foundations
What is Big O Notation?
A way to describe how runtime or memory grows as input size increases.
Learn this term every day on iPhone.
One hand-written term. A real workplace example. Thirty seconds before your day gets loud.
In real work
Big O notation: this search is O(n) because it scans the whole list once.
How is this different from Googling it?
Google gives a definition. Prompthaus pairs each term with how it shows up in standups, PRs, prompts, and design reviews—then quizzes you until the word sticks. One term a day on iPhone.