unit literals;
const A: u32 = 0xFF;
const B: u16 = 0b1010;
const C: u16 = 0o17;
const D: u32 = 1_000_000;
pub fn strings() {
    let a = "hello\\nworld";
    let b = '\x41';
    let c = true;
    let d = null;
    let e = a orelse "fallback";
}