1    do
2        assert 0b10001 == 17
3        assert 0o23 == 19
4        assert 0x15 == 21
5    
6        assert 1e3 == 1000
7        assert 1_000 == 1000
8        assert 8_100_000 == 81e5
9    
10   do
11       let x : u32 = 5
12       let y = 3.max x
13       assert y == 5
14