python operators.pptx

PYTHON
OPERATORS
PRESENTED BY:ZAINAB NIAZ(7614)
AIMAN ELAHI (7612)
BSCS-_8th

PYTHON OPERATORS
Operators Symbols
“Operators are used to perform operations on variables and values”
python divides the operators in the following groups:
1. ARITHMETIC OPERATORS.
2. ASSIGNMENT OPERATORS.
3. COMPARISON OPERATORS.
4. LOGICAL OPERATORS.
5. IDENTITY OPERATORS.
6. MEMBERSHIP OPERATORS.
7. BITWISE OPERATORS.

1. PYTHON ARITHMETIC OPERATORS
“Arithmetic operators are used with numeric values to perform common
mathematical operations”
ADDITION(+)
EXAMPLE
X + Y
X = 5
Y = 3
PRINT(X + Y)
SUBTRACTION(-)
EXAMPLE
X – Y
X = 5
Y = 3
PRINT(X - Y)
MULTIPLICATION(*)
EXAMPLE
X * Y
X = 5
Y = 3
PRINT(X * Y)

…
DIVISION(/)
EXAMPLE
X / Y
X = 12
Y = 3
PRINT(X / Y)
MODULUS(%)
EXAMPLE
X % Y
X = 5
Y = 2
PRINT(X % Y)

…
EXPONENTIATION(**)
EXAMPLE
X ** Y
X = 2
Y = 5
PRINT(X ** Y)
#SAME AS 2*2*2*2*2
FLOOR DIVISION(//)
EXAMPLE
X // Y
X = 15
Y = 2
PRINT(X // Y)
#THE FLOOR DIVISION // ROUNDS THE RESULT DOWN TO
THE NEAREST WHOLE NUMBER

2. PYTHON ASSIGNMENT OPERATORS
Assignment operators are used to assign values to variables:
(ASSIGNS TO) (=) x=5
+=(ASSIGNMENT AFTER ADDITION)
EXAMPLE
X += 3
SAME AS: X = X + 3
X = 5
X += 3
PRINT(X)
-=(ASSIGNMENT AFTER SUBTRACTION)
EXAMPLE
X -= 3
SAME AS: X = X – 3
X = 5
X -= 3
PRINT(X)
*= (ASSIGNMENT AFTER MULTIPLICATION)
EXAMPLE
X *= 3
SAME AS: X = X * 3
X = 5
X *= 3
PRINT(X)

…
/=(ASSIGNMENT AFTER DIVISION)
EXAMPLE
X /= 3
SAME AS: X = X / 3
X = 5
X /= 3
PRINT(X)
%= (ASSIGNMENT AFTER MODULUS)
EXAMPLE
X %= 3
SAME AS: X = X % 3
X = 5
X%=3
PRINT(X)

…
**= (ASSIGNMENT AFTER EXPONENT)
EXAMPLE
X **= 3
SAME AS: X = X ** 3
X = 5
X **= 3
PRINT(X)
//= (ASSIGNMENT AFTER FLOOR DIVISION)
EXAMPLE
X //= 3
SAME AS: X = X // 3
X = 5
X//=3
PRINT(X)

3. PYTHON COMPARISON OPERATORS
“Comparison operators are used to comparing the value of the two operands and returns boolean
true or false accordingly”
EQUAL (==)
EXAMPLE
X == Y
X = 5
Y = 3
PRINT(X == Y)
# RETURNS FALSE BECAUSE 5 IS NOT EQUAL
TO 3
NOT EQUAL (!=)
EXAMPLE
X != Y
X = 5
Y = 3
PRINT(X != Y)
# RETURNS TRUE BECAUSE 5 IS NOT EQUAL
TO 3

…
GREATER THAN (>)
EXAMPLE
X > Y
X = 5
Y = 3
PRINT(X > Y)
# RETURNS TRUE BECAUSE 5 IS GREATER
THAN 3
LESS THAN (<)
EXAMPLE
X < Y
X = 5
Y = 3
PRINT(X < Y)
# RETURNS FALSE BECAUSE 5 IS NOT LESS
THAN 3

…
GREATER THAN OR EQUAL TO
(>=)
EXAMPLE
X >= Y
X = 5
Y = 3
PRINT(X >= Y)
# RETURNS TRUE BECAUSE FIVE IS GREATER
THAN 3
LESS THAN OR EQUAL TO
(<=)
EXAMPLE
X <= Y
X = 5
Y = 3
PRINT(X <= Y)
# RETURNS FALSE BECAUSE 5 IS NEITHER
LESS THAN 3

4. PYTHON LOGICAL OPERATORS
Logical operators are used to combine conditional statements
OR
The logical operators are used primarily in the expression evaluation to make a decision
AND (LOGICAL AND)
Returns true if both statements are true
EXAMPLE
X < 5 AND X < 10
x = 5
print(x > 3 and x < 10)
# returns True because 5 is greater than 3 AND 5 is less than 10

…
OR (LOGICAL OR)
Returns true if one of the statements is true
EXAMPLE
X < 5 OR X < 4
X = 5
PRINT(X > 3 OR X < 4)
# RETURNS TRUE BECAUSE ONE OF THE CONDITIONS ARE TRUE (5 IS GREATER THAN 3,
BUT 5 IS NOT LESS THAN 4)

…
NOT (LOGICAL NOT)
Reverse the result, returns false if the result is true
EXAMPLE
NOT(X < 5 AND X < 10)
X = 5
PRINT(NOT(X > 3 AND X < 10))
# RETURNS FALSE BECAUSE NOT IS USED TO REVERSE THE RESULT

PYTHON OPERATORS
• IDENTITY OPERATORS
• MEMBERSHIP OPERATORS
• BITWISE OPERATORS

5. PYTHON IDENTITY OPERATORS
• Identity operators are used to compare the objects, not if they are equal, but if
they are actually the same object, with the same memory location
Operator Description Example
is
Returns true if both
variables are the same
object
x is y
is not
Returns true if both
variables are not the
same object
x is not y

6. PYTHON MEMBERSHIP OPERATORS
• MEMBERSHIP OPERATORS ARE USED TO TEST IF A SEQUENCE IS
PRESENTED IN AN OBJECT:
Operator Description Example
in
Returns True if a sequence
with the specified value is
present in the object
x in y
not in
Returns True if a sequence
with the specified value is
not present in the object
x not in y

7. PYTHON BITWISE OPERATORS
• BITWISE OPERATORS ARE USED TO COMPARE (BINARY) NUMBERS
Operator Name Description
& AND Sets each bit to 1 if both bits are 1
| OR Sets each bit to 1 if one of two bits is 1
^ XOR Sets each bit to 1 if only one of two bits is 1
~ NOT Inverts all the bits
<< Zero fill left
shift
Shift left by pushing zeros in from the right and let the leftmost bits
fall off
>> Signed
right shift
Shift right by pushing copies of the leftmost bit in from the left, and
let the rightmost bits fall off

python operators.pptx

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python operators.pptx