定义数组(by rust)

fn main(){
let a = [1,2,3,4,5];
let b = [0;20];
println!("{}",a.len());
println!("{}",b.len());
println!("{:?}",a);
println!("{:?}",b);
for x in a.iter(){
println!("{}",x);
}
for x in b.iter(){
println!("{}",x)
}
}

5
20
[1, 2, 3, 4, 5]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
1
2
3
4
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0