# `unwrap` and `expect` ## Example Execute the following command to run [`./solutions/examples/unwrap.rs`](https://github.com/Cyfrin/rust-crash-course/blob/main/topics/unwrap/solutions/examples/unwrap.rs) ```shell cargo run --example unwrap ``` ## Exercises Exercises are in [`./exercises/src/lib.rs`](https://github.com/Cyfrin/rust-crash-course/blob/main/topics/unwrap/exercises/src/lib.rs) ### Exercise 1 ```rust pub fn parse_and_add(a: &str, b: &str) -> u32 { todo!(); } ``` Parse `a` and `b` into `u32` and return the sum. Call `a.parse().expect("...")` to parse `a` into `u32` and unwrap the inner value. Call `expect` with the error message `"Failed to parse variable"`. Do the same for `b`. ### Exercise 2 ```rust pub fn unwrap_and_add(x: Option<u32>, y: Option<u32>) -> u32 { todo!(); } ``` Call `unwrap` to get the inner values of `x` and `y`. Return their sum. ### Test ```shell cargo test ```