rustlings/exercises/variables/variables2.rs

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2018-02-22 13:09:53 +07:00
// variables2.rs
// Make me compile! Scroll down for hints :)
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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.
2018-03-05 02:26:56 +07:00
// 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?