Rust

9.6    Practice Exercises

In this section, we’ll provide some practice questions to help reinforce your learning. The exercise questions cover almost all the concepts introduced in the chapter. Solutions to each exercise will follow in Section 9.7.

1. Completing the closure definitionYou’re provided with an incomplete Rust program that uses a closure. Your task is to complete the code by defining the closure add_to_x so that it adds the value of y to the variable x.

   fn main() {    let x = 10;    let add_to_x = |y| /* Add closure definition here */    let result = add_to_x(5);    println!("Result: {}", result);}  

2. Implementing a mutable closure for incrementing a counterYou’re given an incomplete Rust program that involves a mutable closure. Your task is ...