# Erle Robotics Learning Python GitBook Free

## Exercises:Introduction to Bitwise Operators

###### Exercise 1

We have the variable a = 0b10111011. Use a bitmask and the value a in order to achieve a result where the third bit from the right of a is turned on. Be sure to print your answer as a bin() string.

###### Exercise 2

We have the variable a = 0b10111011..Use a bitmask and the value a in order to achieve a result where all of the bits in a are flipped. Be sure to print your answer as a bin() string.

###### Exercise 3

Define a function called flip_bit that takes the inputs (number, n). Flip the nth bit (with the ones bit being the first bit) and store it in result. Return the result of calling bin(result).

## Solutions

###### Exercise 1
>>> a = 0b10111011
>>>
0b10111111

###### Exercise 2
>>> a = 0b11101110
>>> print bin(result)
0b10001
>>>

###### Exercise 3
>>> def flip_bit(number,n):

Note:mask=(0b1<<n-1)`is going to slide over a number or add zeros to this particular number starting from the right and going left