float function hypot(float a, float b) { let [float x, float y] = [ // x ≥ y max(abs(a), abs(b)), min(abs(a), abs(b)) ]; if (x == 0) // x = y = 0 return 0; // avoid division by zero let float t = y / x; // 0 < t ≤ 1 return x * sqrt(1 + t * t); // > 0 }