What Is the Difference Between a Struct and a Tuple in Rust?

A struct is a named, custom data type with labeled fields, while a tuple is an anonymous, fixed-length collection of values accessed by index. Use structs when you need to group related data with semantic meaning and use tuples for temporary, heterogeneous data without the overhead of naming fields.

// Struct: Named fields, semantic meaning
struct Point {
    x: i32,
    y: i32,
}
let p = Point { x: 10, y: 20 };
println!("{}", p.x); // Access by name

// Tuple: Anonymous, fixed order
let t = (10, 20);
println!("{}", t.0); // Access by index

Think of a struct as a labeled box where you put items in specific slots named 'x' and 'y', making it clear what each item is. A tuple is like a simple bag holding a fixed number of items where you only know their position, not their name. You use structs for complex data you need to reuse and tuples for quick, one-off groupings of different types.