What is Big O Notation?
A way to describe how runtime or memory grows as input size increases.
n ×2 → steps ×2 · O(n)
Big O notation describes…
Write it in your own words in the app.
In real work
Big O notation: this search is O(n) because it scans the whole list once.
In the illustration
The head checks all 8 slots and the counter stops at 8; the belt doubles to 16 slots, the head scans again and the counter reaches 16.
Give me the big o notation for the duplicate finder in your coding agent and rewrite it from the nested loop to a set lookup, then show the two timings on 50,000 rows.
Try it now
The fastest way to learn a word is to use it. Open this line in the agent you already work in and watch what it does. Change the tool to the one you use.
Go further
01Practice
Make it stick
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02Verify
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03Career
Find the work that uses it
See which roles lean on this vocabulary, and what they pay in year one.
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