New be question mpu6050

[semtex]

in this code there is a boolean  (mpuIntStatus & 0x02)

   mpuIntStatus = mpu.getIntStatus();

    // get current FIFO count
    fifoCount = mpu.getFIFOCount();

    // check for overflow (this should never happen unless our code is too inefficient)
    if ((mpuIntStatus & 0x10) || fifoCount == 1024) {
        // reset so we can continue cleanly
        mpu.resetFIFO();
        Serial.println(F("FIFO overflow!"));

    // otherwise, check for DMP data ready interrupt (this should happen frequently)
    } else if (mpuIntStatus & 0x02) 

when i look at the register where mpu.getIntStatus() gets his value  ...Register 58 – Interrupt Status mpu6050 .. I see bit 1 is empty (has no purpose)

soo i dont understand the boolean (mpuIntStatus & 0x02) ... witch seem to do a logic AND operation with this bit

 

 

i must be seeing something wrong ... could anybody help me explaining the boolean (mpuIntStatus & 0x02 ??

 

grtz Ido