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Update 03_a_swift_tour.md

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Jie Liang
2021-12-09 09:05:55 -06:00
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commit 9e8082c6c2
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source/01_welcome_to_swift/03_a_swift_tour.md
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@ -43,7 +43,7 @@ let explicitDouble: Double = 70
值永远不会被隐式转换为其他类型。如果你需要把一个值转换成其他类型，请显式转换。 值永远不会被隐式转换为其他类型。如果你需要把一个值转换成其他类型，请显式转换。
```swift ```swift
let label = "The width is" let label = "The width is "
let width = 94 let width = 94
let widthLabel = label + String(width) let widthLabel = label + String(width)
``` ```