mirror of
https://github.com/rust-lang/rustlings.git
synced 2024-05-18 03:06:08 +02:00
46 lines
538 B
Rust
46 lines
538 B
Rust
// variables4.rs
|
|
// Make me compile! Scroll down for hints :)
|
|
|
|
fn main() {
|
|
let x: i32;
|
|
println!("Number {}", x);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Oops! In this exercise, we have a variable binding that we've created on
|
|
// line 5, and we're trying to use it on line 6, but we haven't given it a
|
|
// value. We can't print out something that isn't there; try giving x a value!
|
|
// This is an error that can cause bugs that's very easy to make in any
|
|
// programming language -- thankfully the Rust compiler has caught this for us!
|