`let mut` — Opting Into Mutability - Day 07
Yesterday we saw that let gives you an immutable binding. But sometimes you genuinely need a variable to change — a counter, a running total, a buffer being filled. For t…
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All posts `let` vs Java's `var`: Immutable by Default - Day 06
In Java, variables are mutable unless you slap final on them. Most developers don’t bother, so everything ends up mutable by default — even when it doesn’t need to be.
`println!` — Why That `!` Matters - Day 05
You’ve seen println!("Hello, world!") already. But why the exclamation mark? In Rust, ! means you’re calling a macro, not a regular function.
`fn main()` — What a Rust Program Looks Like - Day 04
Open src/main.rs and you’ll see this:
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