Zig Academy · Lesson

comptime Parameters and Values

Pass values that exist at compile time.

Some Arguments Must Be Known Early

Sometimes a function needs an argument the compiler can see, not just the running program. Zig lets you mark such a parameter comptime. 🧩

Write comptime before a parameter name to require that its value be known at compile-time. The caller must pass a known value.

fn repeat(comptime n: usize) void {}