Using a library with an alias

---

If for some reason we really need to use the same name from two different libraries, we can use the as keyword to rename one of them for our project. To give it an alias.

examples/libraries/std-pi-use-as/src/main.rs

use std::f32::consts::PI;
use std::f64::consts::PI as bigPI;

fn main() {
    println!("{}", PI);
    println!("{}", bigPI);
}

3.1415927
3.141592653589793