International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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A Comprehensive Review of K-Nearest Neighbor Classification in Supervised Learning

Author(s) Ms. KAMATCHI A, Dr. V. MANIRAJ
Country India
Abstract Machine learning, a key subset of artificial intelligence, has emerged as one of the most influential technologies in today’s digital world. It powers many everyday applications—from search engines to video recommendations. For instance, platforms like Google and YouTube use machine learning algorithms to analyze user behavior and preferences, enabling personalized search results and content suggestions. At its core, machine learning systems operate by receiving input data, learning patterns from it, and producing relevant outputs. These systems are typically trained on historical data, allowing them to make predictions or decisions based on new inputs. This paper focuses on the application of the K-Nearest Neighbor (KNN) algorithm, one of the most straightforward and widely used classification methods in supervised learning. In supervised learning, both input features and their corresponding outputs (labels) are provided to the model during training. This labeled data enables the algorithm to learn from past examples and make accurate predictions when presented with new, unseen data. KNN operates by identifying the 'k' closest data points in the training set to a given input and assigning the most common class among them. This paper explores how KNN is applied to a model dataset and how it classifies new data points based on learned patterns.
Keywords Keywords: Artificial Intelligence, Machine Learning, Supervised Learning, K-Nearest Neighbor (KNN), Classification Algorithm, Labeled Data
Field Computer > Artificial Intelligence / Simulation / Virtual Reality
Published In Volume 7, Issue 4, July-August 2025
Published On 2025-08-04
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E-ISSN 2582-2160
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