mirror of
https://github.com/rust-lang/rustlings
synced 2024-11-18 09:25:36 +00:00
46 lines
538 B
Rust
46 lines
538 B
Rust
// variables4.rs
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// Make me compile! Scroll down for hints :)
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fn main() {
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let x: i32;
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println!("Number {}", x);
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}
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// Oops! In this exercise, we have a variable binding that we've created on
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// line 5, and we're trying to use it on line 6, but we haven't given it a
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// value. We can't print out something that isn't there; try giving x a value!
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// This is an error that can cause bugs that's very easy to make in any
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// programming language -- thankfully the Rust compiler has caught this for us!
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