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6d19292f16
I've taken some work by @fw-immunant and others on the new organization of the course and condensed it into a form amenable to a text editor and some computational analysis. You can see the inputs in `course.py` but the interesting bits are the output: `outline.md` and `slides.md`. The idea is to break the course into more, smaller segments with exercises at the ends and breaks in between. So `outline.md` lists the segments, their duration, and sums those durations up per-day. It shows we're about an hour too long right now! There are more details of the segments in `slides.md`, or you can see mostly the same stuff in `course.py`. This now contains all of the content from the v1 course, ensuring both that we've covered everything and that we'll have somewhere to redirect every page. Fixes #1082. Fixes #1465. --------- Co-authored-by: Nicole LeGare <dlegare.1001@gmail.com> Co-authored-by: Martin Geisler <mgeisler@google.com>
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break and continue
If you want to exit any kind of loop early, use
break.
For loop, this can take an optional expression that becomes the value of the loop expression.
If you want to immediately start
the next iteration use continue.
fn main() {
let (mut a, mut b) = (100, 52);
let result = loop {
if a == b {
break a;
}
if a < b {
b -= a;
} else {
a -= b;
}
};
println!("{result}");
}
Both continue and break can optionally take a label argument which is used
to break out of nested loops:
fn main() {
'outer: for x in 1..5 {
println!("x: {x}");
let mut i = 0;
while i < x {
println!("x: {x}, i: {i}");
i += 1;
if i == 3 {
break 'outer;
}
}
}
}
In this case we break the outer loop after 3 iterations of the inner loop.
- Note that
loopis the only looping construct which returns a non-trivial value. This is because it's guaranteed to be entered at least once (unlikewhileandforloops).