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## F
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| -------- | -------- | -------------------------- |
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| [浮点数] | 数值类型 | `f32` <br> `f64`(默认类型) |
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| F | KWF | FIntroduction |
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[浮点数]: https://course.rs/basic/base-type/numbers.html#浮点类型
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[back](#head)
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## G
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## S
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| ------------ | -------- | ------------------------------------------------------------------------------------------------------ |
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| [整数] | 数值类型 | 有符号整数,`i8`,`i16`,`i32`,`i64`,`i128`,`isize`<br>无符号整数,`u8`,`u16`,`u32`,`u64`,`u128`,`usize` |
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| [整形字面量] | 进制书写 | 十进制 `98_222`<br>十六进制 `0xff`<br>八进制 `0o77`<br>二进制 `0b1111_0000`<br>字节(仅限于`u8`) `b'A'` |
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| S | KWS | SIntroduction |
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[整数]: https://course.rs/basic/base-type/numbers.html#整数类型
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[整形字面量]: https://course.rs/basic/base-type/numbers.html#整数类型
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[back](#head)
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## T
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## X
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| ------ | ------ | ---------------------------------------------------------------------------------- |
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| [序列] | Range | 生成连续的数值<br> 只允许用于数字或字符类型<br> `..` 右半开区间 <br>`..=` 闭合区间 |
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| X | KWX | XIntroduction |
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[序列]: https://course.rs/basic/base-type/numbers.html#序列range
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[back](#head)
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## Y
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