IT, Programming, & Web Development › Forums › CS50’s Introduction to Computer Science by Harvard University on Edx › Week 6: Python › CS105: Introduction to Python by Saylor Academy › Unit 2: Operators › Bitwise vs. logical Boolean expressions in Python: Key differences and practical applications
 This topic is empty.

AuthorPosts

August 6, 2024 at 5:07 am #3179
Source: Generated through AI tool
In Python, bitwise and logical boolean expressions are two different ways to perform logical operations, and they serve different purposes. Let’s break down each one in detail:
Logical Boolean Expressions
Logical boolean expressions use the
and
,or
, andnot
operators to evaluate conditions based on their truth values. These operators work with boolean values (True
andFalse
) and are typically used in conditional statements.Operators:
and
: ReturnsTrue
if both operands are true.or
: ReturnsTrue
if at least one operand is true.not
: Returns the opposite of the operand’s boolean value.
Examples:
a = True b = False # Logical AND result_and = a and b # False # Logical OR result_or = a or b # True # Logical NOT result_not = not a # False
Bitwise Boolean Expressions
Bitwise boolean expressions use the
&
,
,^
,~
,<<
, and>>
operators to perform operations on the binary representations of integers. These operators work at the bit level.Operators:
&
(bitwise AND): Sets each bit to 1 if both bits are 1.
(bitwise OR): Sets each bit to 1 if one of the bits is 1.^
(bitwise XOR): Sets each bit to 1 if only one of the bits is 1.~
(bitwise NOT): Inverts all the bits.<<
(left shift): Shifts bits to the left by the specified number of positions. –>>
(right shift): Shifts bits to the right by the specified number of positions.
Examples:
a = 0b1010 # 10 in binary b = 0b1100 # 12 in binary # Bitwise AND result_and = a & b # 0b1000 (8 in decimal) # Bitwise OR result_or = a  b # 0b1110 (14 in decimal) # Bitwise XOR result_xor = a ^ b # 0b0110 (6 in decimal) # Bitwise NOT result_not = ~a # 11 in decimal (Two's complement representation) # Left Shift result_left_shift = a << 2 # 0b101000 (40 in decimal) # Right Shift result_right_shift = a >> 2 # 0b0010 (2 in decimal)
Key Differences
 Data Types:
– Logical boolean expressions operate on boolean values (
True
andFalse
).
– Bitwise boolean expressions operate on integers and their binary representations. Usage:
– Logical boolean expressions are used for control flow and conditional logic.
– Bitwise boolean expressions are used for lowlevel operations, such as manipulating individual bits within an integer. Operators:
– Logical boolean operators:
and
,or
,not
.
– Bitwise boolean operators:&
,
,^
,~
,<<
,>>
. ShortCircuiting:
– Logical boolean operators (
and
,or
) shortcircuit. This means they stop evaluating as soon as the result is determined. For example, ina and b
, ifa
isFalse
,b
is not evaluated.
– Bitwise operators do not shortcircuit; they always evaluate both operands.Practical Example
Logical Boolean Expression:
x = 5 y = 10 if x < 10 and y > 5: print("Both conditions are true") # Output: Both conditions are true
Bitwise Boolean Expression:
x = 5 # 0b0101 y = 3 # 0b0011 result = x & y print(bin(result)) # Output: 0b0001 (1 in decimal)
In summary, logical boolean expressions are used for highlevel logical operations involving true/false values, while bitwise boolean expressions are used for lowlevel operations on the binary representations of integers. They serve different purposes and are suited for different types of problems.

AuthorPosts
 You must be logged in to reply to this topic.