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‎src/algorithms/math/factorial/README.zh-CN.md

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# 阶乘
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在数学上, 一个正整数 `n` 的阶乘 (写作 `n!`), 就是所有小于等于 `n` 的正整数的乘积. 比如:
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```
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5! = 5 * 4 * 3 * 2 * 1 = 120
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```
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| n | n! |
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| ----- | --------------------------: |
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| 0 | 1 |
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| 1 | 1 |
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| 2 | 2 |
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| 3 | 6 |
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| 4 | 24 |
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| 5 | 120 |
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| 6 | 720 |
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| 7 | 5 040 |
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| 8 | 40 320 |
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| 9 | 362 880 |
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| 10 | 3 628 800 |
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| 11 | 39 916 800 |
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| 12 | 479 001 600 |
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| 13 | 6 227 020 800 |
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| 14 | 87 178 291 200 |
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| 15 | 1 307 674 368 000 |
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