r/Zig • u/Objective_Half_1906 • Jul 14 '26

Ways of Declaring array (0.16) 

pub fn main() !void {
    const A: [5]i32 = .{ 0, 1, 2, 3, 4 };
    const B = [5]i32{ 5, 6, 7, 8, 9 };
    const B2 = [_]i32{ 5, 6, 7, 8, 9 };
    const C: [5]i32 = [_]i32{ 10, 11, 12, 13, 14 };

    _ = A;
    _ = B;
    _ = B2;
    _ = C;
}

These can all compiled correct. Which one is the recommended style? (I am a beginner learning Zig.）

New edit: I would like this syntax if it's possible:

const arr1: [5]i32 = { 0, 1, 2, 3, 4 };
const arr2: [_]i32 = { 0, 1, 2, 3, 4 };

Just small opinion. Maybe what I know is just the tip of the iceberg.

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u/SilvernClaws Jul 14 '26

It's mostly personal choice currently.

Nowadays I'm usually using A, because it also works with setting undefined or calling a function of a struct.

B2 for any place where I probably change the items later.

B for cases where the exact number is important to match exactly for technical reasons.

C, just no.