ZoKrates/zokrates_cli/examples/arrays/array_loop_update.zok

def main() -> u32[3] {
    u32[3] a = [1, 2, 3];
    u32[3] mut c = [4, 5, 6];
    for u32 i in 0..3 {
        c[i] = c[i] + a[i];
    }
    return c;
}