rustlings/exercises/variables/variables2.rs
Roberto Vidal 2cdd61294f feat: improve watch execution mode
The `watch` command now requires user action to move to the next
exercise.

BREAKING CHANGE: this changes the behavior of `watch`.
2019-11-11 16:23:35 +01:00

50 lines
575 B
Rust

// variables2.rs
// Make me compile! Scroll down for hints :)
// I AM NOT DONE
fn main() {
let x;
if x == 10 {
println!("Ten!");
} else {
println!("Not ten!");
}
}
// The compiler message is saying that Rust cannot infer the type that the
// variable binding `x` has with what is given here.
// What happens if you annotate line 5 with a type annotation?
// What if you give x a value?
// What if you do both?
// What type should x be, anyway?
// What if x is the same type as 10? What if it's a different type?