Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

struct

A small value type you define yourself.

A struct is a user-defined value type; readonly structs guarantee immutability.

Loading interactive…

Examples

struct Point { public int X; public int Y; }: assigning one Point to another copies both numbers.