Calculator NPR vs NCR

About This Tool

This calculator provides fast, accurate computation of permutation (nPr) and combination (nCr) values for non-negative integers. Designed for students, teachers, data analysts, and anyone working with probability or combinatorics, it simplifies complex calculations. Simply input the values of 'n' and 'r', choose the calculation type (permutation or combination), and receive results instantly. Behind the scenes, it uses optimized factorial algorithms to prevent overflow and ensure precision.
The user-friendly interface is fully responsive, accessible, and minimalistic, with clear labels and prompts. Results are displayed below the input fields, with explanations of what the numbers represent. Optional features include a calculation history log, multi-language support, export options, and a dark mode toggle for user preference. It handles edge cases such as negative inputs or 'r' greater than 'n' with informative error messages. Use this tool to quickly solve counting problems in education, research, or technical projects, saving time and reducing manual errors.

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