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let mut number = 3; can lead to a correct answer, so the comment helps to direct the users to the intended answer. |
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| README.md | ||
| variables1.rs | ||
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Variables
In Rust, variables are immutable by default. When a variable is immutable, once a value is bound to a name, you can’t change that value. You can make them mutable by adding mut in front of the variable name.