Rust 入门 - 控制流

if

let a = 8;
if a == 8 {
    println!("a = 8");
} else {
    println!("a != 8");
}

if 表达式

let sw = true;
let a = if sw { 6 } else { 8 };
println!("a = {}", a);

loop

let mut index = 0;
loop {
    if index == 10 {
        break;
    }
    index += 1;
}
println!("index = {}", index);

loop 表达式

let mut index = 0;
let res = loop {
    if index == 10 {
        break index * 10;
    }
    index += 1;
};
println!("index = {}", index);
println!("res = {}", res);

while

let mut index = 0;
while index < 10 {
    index += 1;
    println!("index = {}", index);
}
println!("index = {}", index);

数组遍历

let nums: [u32; 5] = [1, 2, 3, 4, 5];
for n in &nums {
    println!("n = {}", n);
}

for n in nums.iter() {
    println!("n = {}", n);
}