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# Variables
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In Rust, variables are immutable by default.
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When a variable is immutable, once a value is bound to a name, you can’t change that value.
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You can make them mutable by adding `mut` in front of the variable name.
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## Further information
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2019-06-06 20:17:22 -07:00
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- [Variables and Mutability](https://doc.rust-lang.org/book/ch03-01-variables-and-mutability.html)
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