Python operators

​Python operators

Operators
~special symbols or keywords that perform operations on data values (operands).

~The values that an operator acts on are called operands

Example:
a=20# = operator-----a --> operand
b=30
print(a+b)-->Operator???? operand????

Operators

1. Arithmetic operators

2. Assignment operators

3. Comparison operators

4. Logical operators

5. Membership operators

6. Identity operators

7. Bitwise operators
   

Importance of operators:
​~To express computations and manipulate data.

~To control the flow of a program based on conditions.

~To improve efficiency and performance.

~To enable data manipulation and transformation.

~To enhance code readability and expressiveness.

~To facilitate algorithm design and implementation.

~Essential for calculations in programs, from simple sums to complex algorithms.

​

Arithmetic/mathematical operators

​Example:
x=50
y=7

Example 1:

x=100
y=3
print(x%y)

output?????

​

% (Modulus):

~ Divides left hand operand by right hand operand and returns remainder

​

​** (Exponent):
~  Performs exponential (power) calculation on operators..

Example:
x=2
y=5
z=x**y #x raised to the power of y
#same as 2*2*2*2*2
print(z)
Output?????

// (floor division):
~  The division of operands where the result is the quotient in which the digits after the decimal point are removed.
# Example:
x=10

y=3

z=x//y

print(z)

​ hands on practice......

x = 7 y = 3
SL_No	Expression statement	Answer	Remarks
1	x + y		Sum of x and y
2	x - y
3	x * y
4	x / y
5	x // y
6	x % y
7	x** y

​Comparison operators:
~Also known as relational operators

~are used to compare two values

~Returns true or false based on the validity of the comparison

​ 

x = 7 y = 3
SL_No	Comparison statement	Result
1	x==y
2	x!=y
3	x>y
4	x<y
5	x>=y
6	x<=y

​Assignment Operators:
~used to assign values to variables
~allow us to store and update data in variables efficiently

Hands on practice:

use x and y to calculate for the given assignment operators:
x=20
y=3

1. x+=y
2.x-=y
3. x*=y
4. x%=y
5. x/=y
6. x//=y
7. x**=y

Open Ended

• Write down the differences between the following operators with an example each:

1. = and ==

2. / and //

3. * and **

​ Answer:

= operator	== operator
= is an assignment operator and used to assign value to  a variable.	is an equal operator and is used to check equality between two operands.
/ operator	// operator
is a regular division and returns the remainder as the float data type.	is a floor division and returns the remainder as the int data type.
* operator	** operator
is used for regular multiplication.	is used for represent a number in the power form.

​ are used to combine conditions (True/False values). They return either True or False.

​logical operators

​ 

Operator	Description	Example	Result
and	Returns True if both statements are true	6 > 7 and 6 > 3	False
or	Returns True if one of the statement is true	6 > 7 or 6 > 3	True
not	Reverse the result, returns false if the result is true	not (6 > 7)	True

​Logical Operators Example

​ 

x, y, z = 10, 15, 7
x > y	y > z	x > y and y > z	x > y or y > z	not x > y	not y > z

​Activity

Identity operator:
are used to check whether two objects or values refer to the same object in memory.

• They evaluate the identity of the operands rather than their values.

• There are two identity operators:

• is 

• is not

Example:
x=20
y=20
print(x is y)

​is not:
~Returns True if both variables are not the same object
Example:

x = 20

y = 20
print(x is not y)


Output????

​Membership operators:
are used to test whether a value or an object is a member of a sequence or a collection.

• They evaluate the membership of the operands.

• in 

• not in

Example:
x = [2,4,6]

print( 2 in x)

return true....
Example:
x = [2,4,6]

print( 2 not in x)

Output????

Try it.....