What do $ and _ mean in SwiftUI?
When do you use $ and when do you use _ with SwiftUI and Swift?
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Between SwiftUI and Swift you will see different uses of the dollar sign ($) and the underscore (_) symbol. They are used in closures which are a cornerstone of SwiftUI development, with property wrappers, state, and argument names. You can omit parameter names by using the underscore.
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