Rust learning: lessons, notes, and exercise crates

variables/.gitignore

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+/target

variables/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "variables"
+version = "0.1.0"

variables/Cargo.toml

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+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

variables/src/main.rs

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+fn main() {
+    let mut x = 5;
+    println!("the value of x is {x}");
+    x = 3;
+    {
+        let x = x * 2;
+        println!("The value of x in the inner scope is: {x}");
+    }
+
+    println!("the value of x is {x}");
+
+    const THREE_HOURS_IN_SECONDS: u32 = 60 * 60 * 3;
+    let tup: (i32, f64, u8) = (500, 6.4, 1);
+
+    let (x, y, z) = tup;
+
+    let a: [i32; 5] = [1, 2, 3, 4, 5];
+    let b: [i32; 5] = [0; 5];
+
+    println!("number {}", tup.0);
+    another();
+}
+
+fn another() {
+    println!("another one");
+}