Course Six - Operators in Python

Operators in Python

By ienex

Operators are symbols that perform operations on variables or values. For example, in the expression 4 + 5 = 9, the numbers 4 and 5 are operands, and + is the operator.

Python provides several types of operators, including:

1. Arithmetic Operators

2. Comparison (Relational) Operators

3. Assignment Operators

4. Logical Operators

5. Bitwise Operators

6. Identity Operators

7. Membership Operators

8. Operator Precedence

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1. Arithmetic Operators

Arithmetic operators perform basic mathematical operations.

Example:

a = 21
b = 10
c = 0

c = a + b
print("Line 1 - Value of c is", c)

c = a - b
print("Line 2 - Value of c is", c)

c = a * b
print("Line 3 - Value of c is", c)

c = a / b
print("Line 4 - Value of c is", c)

c = a % b
print("Line 5 - Value of c is", c)

a = 2
b = 3
c = a ** b
print("Line 6 - Value of c is", c)

a = 10
b = 5
c = a // b
print("Line 7 - Value of c is", c)

Output:

Line 1 - Value of c is 31
Line 2 - Value of c is 11
Line 3 - Value of c is 210
Line 4 - Value of c is 2
Line 5 - Value of c is 1
Line 6 - Value of c is 8
Line 7 - Value of c is 2

Operator	Description	Example
+	Addition	a + b
-	Subtraction	a - b
*	Multiplication	a * b
/	Division	b / a
%	Modulus (remainder)	b % a
**	Exponentiation	a ** b
//	Floor Division	9 // 2 = 4

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2. Comparison (Relational) Operators

Comparison operators compare two values and return a Boolean result (True or False).

a = 21
b = 10

if a == b:
    print("Line 1 - a is equal to b")
else:
    print("Line 1 - a is not equal to b")

if a != b:
    print("Line 2 - a is not equal to b")
else:
    print("Line 2 - a is equal to b")

if a < b:
    print("Line 3 - a is less than b")
else:
    print("Line 3 - a is not less than b")

if a > b:
    print("Line 4 - a is greater than b")
else:
    print("Line 4 - a is not greater than b")

if a <= b:
    print("Line 5 - a is less than or equal to b")
else:
    print("Line 5 - a is not less than or equal to b")

if b >= a:
    print("Line 6 - b is greater than or equal to a")
else:
    print("Line 6 - b is not greater than or equal to a")

Output:

Line 1 - a is not equal to b
Line 2 - a is not equal to b
Line 3 - a is not less than b
Line 4 - a is greater than b
Line 5 - a is not less than or equal to b
Line 6 - b is greater than or equal to a

Operator	Description	Example
==	Equal to	a == b
!=	Not equal to	a != b
>	Greater than	a > b
<	Less than	a < b
>=	Greater than or equal to	a >= b
<=	Less than or equal to	a <= b

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3. Assignment Operators

Assignment operators store values in variables, optionally performing operations at the same time.

a = 21
b = 10
c = 0

c = a + b
print("Line 1 - Value of c is", c)

c += a
print("Line 2 - Value of c is", c)

c *= a
print("Line 3 - Value of c is", c)

c /= a
print("Line 4 - Value of c is", c)

c = 2
c %= a
print("Line 5 - Value of c is", c)

c **= a
print("Line 6 - Value of c is", c)

c //= a
print("Line 7 - Value of c is", c)

Operator	Description	Example
=	Assigns value	c = a + b
+=	Add and assign	c += a → c = c + a
-=	Subtract and assign	c -= a → c = c - a
*=	Multiply and assign	c *= a → c = c * a
/=	Divide and assign	c /= a → c = c / a
%=	Modulus and assign	c %= a → c = c % a
**=	Exponent and assign	c **= a → c = c ** a
//=	Floor divide and assign	c //= a → c = c // a

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This covers the basic arithmetic, comparison, and assignment operators in Python. Logical, bitwise, identity, and membership operators follow similar principles.