If let statement

Example

Execute the following command to run ./solutions/examples/if_let.rs

cargo run --example if_let

pub fn unwrap_or_default(x: Option<u32>, v: u32) -> u32 {
    todo!();
}

Use the if, let syntax to extract the value stored inside a Some.

Return the inner value.

If x is None, then return the default value v.

cargo test