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Add variables5 to introduce shadowing #264

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11 changes: 11 additions & 0 deletions exercises/variables/variables5.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
// variables5.rs
// Make me compile! Execute the command `rustlings hint variables5` if you want a hint :)

// I AM NOT DONE

fn main() {
let number = "3";
println!("Number {}", number);
number = 3;
println!("Number {}", number);
}
14 changes: 14 additions & 0 deletions info.toml
Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,20 @@ 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!"""

[[exercises]]
name = "variables5"
path = "exercises/variables/variables5.rs"
mode = "compile"
hint = """
In variables3 we already learned how to make an immutable variable mutable
using a special keyword. Unfortunately this doesn't help us much in this exercise
because we want to assign a different typed value to an existing variable. Sometimes
you may also like to reuse existing variable names because you are just converting
values to different types like in this exercise.
Fortunately Rust has a powerful solution to this problem: 'Shadowing'!
You can read more about 'Shadowing' in the book's section 'Variables and Mutability'.
Try to solve this exercise afterwards using this technique."""

# IF

[[exercises]]
Expand Down