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技术 2022年11月9日
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说明:下面创建一个函数,调用自定义函数返回一个返回一个随机数。

(1) 创建自定义函数

<img src="data:image/png;base64,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" alt="" />

(2) 调用自定义函数方法

<img src="data:image/png;base64,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" alt="" />

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