Rust numerical types

By default integer numbers are stored in i32 that has a range of -2147483648..=2147483647.
By default floating point numbers are stored in f64.
We can explicitely put numbers in different types.
In Python a small integers takes up 28 bytes. Size of integers in Python.

examples/numbers/number-types/src/main.rs

#![allow(clippy::approx_constant)]

fn main() {
    let number = 139871;
    println!("{number}");

    let number: i8 = 100;
    println!("{number}");

    let number: u8 = 255;
    println!("{number}");

    let number = 300_000_000;
    println!("{number}");

    let number: i64 = 3_000_000_000;
    println!("{number}");

    let number = 3.14;
    println!("{number}");

    let number: f32 = 3.14;
    println!("{number}");
}