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Update blocks.md (#235)

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Adding the important note about ";" in blocks.
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Igor Petruk 2023-01-23 12:03:06 +00:00 committed by GitHub
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src/control-flow/blocks.md
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@ -34,3 +34,5 @@ fn main() {
println!("doubled: {}", double(7));
}
```
However if the last expression ends with `;`, then the resulting value and type is `()`.