Why KNN algorithm is used?

Related questions

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2. How do I find the aspect ratio?
3. What are examples of projection?
4. What aspect ratio is my screen?
5. What is a Nearest Neighbor algorithm?
6. Which aspect ratio is best?
7. What is KNN algorithm example?
8. What is OpenCV python used for?
9. What resolutions are the same ratio as 1920x1080?
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Tags

1. #sample
2. #point
3. #separated
4. #algorithms
5. #predict
6. #database
7. #parametric
8. #learning
9. #points
10. #simplest
11. #classes
12. #purpose
13. #several
14. #which
15. #classification
16. #algorithm