MPU-6050 doubt in playgroud code Arduino.cc
The line

Wire.requestFrom(MPU,14,true);


initiates a read transfer using I2C.  The read consists of two 8 bit values, which are then joined together into a single 16 bit value:

AcX=Wire.read()&lt;&lt;8|Wire.read();  // 0x3B (ACCEL_XOUT_H) &amp; 0x3C (ACCEL_XOUT_L)    


That basically means "Read one byte, shift it left 8 bits, read a second byte, and OR the two values together".

So if the first byte is (in binary) 0b00100100 and the second is 0b10101010 then the result would be 0b0010010010101010.

In hexadecimal that would be taking 0x24, shifting it left to 0x2400, then or-ing 0xAA with it, to form 0x24AA.

In decimal it would be taking the number 36, shifting it left 8 bits to make it 9216, then or-ing 170 to make 9386.