Loops in Rust aren’t the same as standard C-style languages. The syntax is different and there are some powerful options that make looping easier. First, let’s go over some looping basics, then we will cover how to handle breaking and continuing in nested loops in Rust.
Standard For-Loop ๐
fn main() {
for x in 0..10 {
println!("{}", x);
}
}
Which prints:
0
1
2
3
4
5
6
7
8
9
0..10 is an iterator where the lower-bound is inclusive and the upper bound is exclusive.
More generically:
for var in iterator {
// do stuff
}
In my opinion, all languages should move to a single syntax with for-loops based on iterators. The simplicity makes Rust’s loops easy to read, while the ability to create custom iterators makes it more powerful than even more verbose formats like Go’s:
for i := 0; i < 10; i++ {
fmt.Println(i)
}
Rust’s for-loop doesn’t specify what happens after each iteration (i++) or what condition is required to continue the loop (i < 10), an iterator is simply supplied.
Come to the dark side

Regards and sorry for the interruption, Lane here! I built Boot.dev to give you a place to learn back-end development the...hard way? I mean easy? Maybe the "heasy" way? I don't know.
It's hard because you will have to write code... like a metric ton of code. It's easy because my courses have a built-in game that's pretty darn fun. Give it a try.
Continue and Break ๐
for x in 0..10 {
if x > 5 && x < 7 {
continue
}
println!("{}", x);
}
The continue
keyword works in a familiar manner. In this example when x > 5 AND x < 7
the loop continues to the next iteration without printing. This results in:
0
1
2
3
4
5
7
8
9
The break
keyword is also familiar:
for x in 0..10 {
if x > 5{
break
}
println!("{}", x);
}
which prints:
0
1
2
3
4
5
Working With Nested Loops ๐
Nested loops can get tricky in a lot of languages. What if I want to continue through an outer loop when a condition within an inner loop occurs? We can do the following:
'outer: for x in 0..5 {
for y in 0..5 {
if y > 2{
break 'outer
}
println!("x: {}, y: {}", x, y);
}
}
prints:
x: 0, y: 0
x: 0, y: 1
x: 0, y: 2
By using the label 'outer
we are able to control explicitly which loop is broken. The default would have been to just break from the inner loop. The same labeling system works with the continue keyword as well.