Donut Charts
Donut charts are a type of data visualization that display categorical data as proportional segments of a circular ring, similar to pie charts but with a hollow center. They are used to show the composition of a whole, where each segment represents a category's percentage or proportion. The hollow center can optionally display additional information like totals or labels, making them useful for dashboards and reports.
Developers should learn donut charts when building data-driven applications, dashboards, or reporting tools that require visualizing part-to-whole relationships, such as in business analytics, financial summaries, or survey results. They are particularly useful in web and mobile apps where space is limited, as the hollow center can save visual clutter compared to pie charts. Use cases include displaying budget allocations, market share, or user demographics in tools like React or D3.js-based visualizations.