i32
parse
expect
::<>()

Convert string to (integer) number - parse, turbofish

In the printing we won't see the difference, but we can do numberical operations on numbers.
We can either define the expect type next to the variable name where we are assigning to.
Or we can use the so-called turbofish operator ::<>() as we do in the second example.

examples/convert/string-to-int/src/main.rs

fn main() {
    let text = "23";
    println!("{text:?}");
    println!();

    let number: i32 = text.parse().unwrap();

    println!("{number}",);
    println!("{}", number + 1);
    println!();

    let number = text.parse::<i32>().expect("Could not convert to i32");
    println!("{number}",);
    println!("{}", number + 1);

    let text = "3.14";
    let number = text.parse::<i32>().unwrap();
    //.expect("Could not convert to i32");
    println!("{number}",);
}