Implement the countdown using a Range

branches/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "branches"
+version = "0.1.0"

branches/Cargo.toml

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+[package]
+name = "branches"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

branches/src/main.rs

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+fn main() {
+    let number = 3;
+
+    if number < 5 {
+        println!("condition was true");
+    } else {
+        println!("condition was false");
+    }
+}

functions/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "functions"
+version = "0.1.0"

functions/Cargo.toml

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+[package]
+name = "functions"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

functions/src/main.rs

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+fn main() {
+    print_labeled_measurement(5, 'h');
+}
+
+fn print_labeled_measurement(value: i32, unit_label: char) {
+    println!("The measurement is: {value}{unit_label}");
+}

loops/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "loops"
+version = "0.1.0"

loops/Cargo.toml

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+[package]
+name = "loops"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

loops/src/main.rs

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+fn main() {
+    for number in (1..4).rev() {
+        println!("{number}!");
+    }
+    println!("LIFTOFF!!!");
+}

variables/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "variables"
+version = "0.1.0"

variables/Cargo.toml

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+[package]
+name = "variables"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

variables/src/main.rs

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+fn main() {
+    let mut x = 5;
+    println!("The value of x is: {x}");
+    x = 6;
+    println!("The value of x is: {x}");
+}