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Iterating Over a Slice with a For Loop

A for loop walks every item in a collection in order, handing you one at a time, without you managing an index. Because the loop knows where the data ends, it cannot walk off the edge. This is the ordinary way to read or fill a buffer in Rust.

Questions this Concept answers

Why can a `for` loop over a slice not run past the end of the buffer?

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Iterator-Based For Loops in Rust

In Rust, all `for` loops operate over an iterator rather than an index-based sequence: any expression that produces an iterator (such as a range or a collection's `.iter()` call) can drive a `for` lo…