What Is the Difference Between const and static in Rust?

Use const for compile-time constants evaluated at compile time, and static for global variables that live for the entire program duration. const values are inlined at every use site, while static values have a single memory address. Use static when you need a mutable global (with unsafe) or a reference to a single shared value.

const MAX_POINTS: u32 = 100_000;
static LANGUAGE: &str = "Rust";

fn main() {
    println!("{MAX_POINTS}");
    println!("{LANGUAGE}");
}

Think of const as a fixed rule written into the code itself, like a mathematical constant, while static is a specific spot in memory that exists for the whole time the program runs. You use const for values that never change and are calculated before the program starts. You use static when you need a single, shared piece of data that persists across the entire application.