for
The for loop iterates over ranges of values or the items in a collection:
fn main() {
for x in 1..5 {
println!("x: {x}");
}
for elem in [1, 2, 3, 4, 5] {
println!("elem: {elem}");
}
}
- Under the hood
for
loops use a concept called “iterators” to handle iterating over different kinds of ranges/collections. Iterators will be discussed in more detail later. - 请注意,
for
循环只迭代到4
。现在展示使用1..=5
语法表示一个包含边界的范围。
上一篇:6.2. 循环控制
下一篇:6.2.2. loop