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Level 3

Bit Manipulation

TUTORIAL

1. What Is Binary Number System

2. Understanding Data Types Int

3. Bitwise Operators

4. Bitwise Operators ( Contd.. )

5. Tricks With Bits

6. Bitwise And Logical Operators :

Bitwise Operators ( Contd.. )

Right shift operator
Left Shift Operator

Right Shift Operators :

Syntax :

A >> x

What does A » x mean :

A >> x implies shifting the bits of A to the right by x positions. The last x bits are lost this way.

Example : Lets say

                A = 29 ( 11101 ) and x = 2, 
                so A >> 2 means
                     0 0 1 1 1 0 1 >> 2
                               ====  -> is lost 
                    ========== -----> this sequence of digit shifts to the right by 2 positions
                    ----------------
                     0 0 0 0 1 1 1 = 7

A >> x is equal to division by pow(2, x). Think why.

Left shift operators :

Syntax :

A << x

What does A « x mean :

A << x implies shifting the bits of A to the left by x positions. The first x bits are lost this way. The last x bits have 0. Example : lets say

                A = 29 ( 11101 ) and x = 2, 
                so A << 2 means
                     0 0 1 1 1 0 1 << 2
                     =============  ------> this sequence of digit shifts to the left by 2 positions
                    ----------------
                     1 1 1 0 1 0 0  = 116

A << x is equal to multiplication by pow(2, x). Think why. 1 << x is equal to pow(2, x).

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Level 3

Bit Manipulation

Bitwise Operators ( Contd.. )

Right Shift Operators :

Syntax :

What does A » x mean :

Left shift operators :

Syntax :

What does A « x mean :