// example of a pure function function random(m_w, m_z) { m_z = 36969 * (m_z & 65535) + (m_z >> 16); m_w = 18000 * (m_w & 65535) + (m_w >> 16); return (m_z << 16) + m_w; } console.log(random(4, 35)); console.log(random(5, 35)); console.log(random(555, 32));