Arithmetic Operators in Python Class 11 Notes & Important Questions

Arithmetic Operators in Python

What are Operators ?

Operators are special symbols which perform a special task on values or variables. Same operator can behave differently on different data types.

What do you mean by Operand?

Operands are the values or variables on which the operator operate.

What do you mean by Expression in python?

Operators when applied on operands form an expression. for example

a = c – d

Identify the operator and operand in the following expression.

1) d = a * b

Here d, a, b are operands and = , * are operators

2) c = a + b

Here c, a, b are operands and =, + are operators

Operators are categorized as

1. Arithmetic

2. Relational

3. Logical

4. Assignment

Arithmetic / Mathematical Operators

Those operators which perform mathematical calculation are called Arithmetic / Mathematical Operators.

Symbol	Name	Coding	Output
+	Addition	>>> 6 + 9 >>> ‘CS’ + ‘IP’ >>> 2.4 + 5 >>>3.5 + 2.5 >>> 2.5 + ‘CS’	15 CSIP 7.4 6.0 TypeError
–	Subtraction	>>> 9 – 2 >>> 7.5 – 2 >>> 10.6 – 5.6	7 5.5 5.0
*	Multiplication	>>> 2 * 6 >>> 5.2 * 2 >>> 2.5 * 2.5 >>> “Hello” * 2 >>> 2 * “Hello”	12 10.4 6.25 HelloHello HelloHello
/	Division	>>> 7 / 2 >>> 7.0 / 2 >>> 7.0 / 2.0	3.5 3.5 3.5
%	Remainder	>>> 7 % 2 >>> 2 % 5 >>> 7.2 % 2.0	1 2 1.2
**	Exponentiation	>>> 2 ** 3 >>> 2.0 * 3.0 >>> 2.0 ** 3	8 8.0 8.0
//	Integer Division	>>> 7 // 2 >>> 8.5 // 2	3 4.0

Q1. Evaluate the following Expressions

a) 2 + 3//4 -7

Ans. -5

b) 45 %6 **1 *4

Ans. 12

c) 45 – 9**2 % 15

Ans. 39

d) “CS” ** 10%3

Ans. Error

e) 79 – 3*4 +6 // 2

Ans. 70

f) 35 / 45 // 7

Ans. 0.0

g) 3 + 4 – 7 + 6 %2

Ans. 0

h) 2 % 7 + 9 // 2

Ans. 6

i) 35 * 2 ** 2

Ans. 140

j) 95 – 100 % 99 – 7 **2

Ans. 45

Q2. Name a mathematical operator in python which returns the remainder.

Ans. Modulus (%)

Q3. What is the difference between * and ** ?

Ans. * operator returns the product of two numbers for example 2 * 3 returns 6. ** operator returns the exponent of one number to other for example 2 ** 3 returns 8.

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