format

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println!("hello");


println!("{:?}", 1.0/2.0);

let a: i32 = 3;
let b:u32 = 3;
let i: i32 = 2;

println!("{:?}, {}", a.pow(b), a.pow(i as u32));
hello

binary, hex

1

println!("ob{:b}, ox{:X}", 16, 15);
ob10000, oxF