ts 定义一个num：number 但是 num默认值不想写数字怎么破

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asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

ts 定义一个num：number 但是 num默认值不想写数字并且if判断的时候偶默认值还是false 怎么破写null和undefined都报错

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1 Answer

深蓝 · Answer 1 · 2021-01-27T03:55:15+0000

answered Jan 27, 2021 by 深蓝 (71.8m points)

num: number | null

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