hello rust expressions / published by https://github.com/dacr/code-examples-manager #9c87bdfa-32f5-4ebe-8bbe-a4ff74057715/ec5c13983bc38791bbefce5a8862f24d24d79136

hello-expressions.rs

#!/usr/bin/env rust-script
// summary : hello rust expressions
// keywords : rust, expressions, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 9c87bdfa-32f5-4ebe-8bbe-a4ff74057715
// created-on : 2024-10-12T21:26:15+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : ./$file

fn main() {
    // instruction (separated using ;)
    let v1 = 5;

    // expression (no ;) ⚠️
    let v2 = {
        let mut x = 1;
        x += 5;
        x
    };
    assert_eq!(v2, 6);

    let text = if v2 < 0 {
        "Value is negative" // no ; ⚠️ because expression
    } else if v2 > 0 {
        "Value is positive" // no ; ⚠️ because expression
    } else {
        "Value is zero" // no ; ⚠️ because expression
    };
    println!("{}", text);
}