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Keyword: A Keyword is a pre-defined reserved name in a programming language like
python which has fixed working or function. Its function cannot be changed at all
during programming. Some of the examples are if, else, in, for, etc.

2.3 OPERATORS (ARITHMETIC & RELATIONAL)

Operator: Operators are special symbols that are used to perform operations on
operands. The values that an operator works on are called operands.

Expression: An expression is combination of operator and operands.
Arithmetic Operator: Arithmetic operator is used to apply basic mathematical
operations like addition, subtraction, multiplication, division, etc. These operators
require two operands to operate. Following are some of the binary operator:

Name of Operator Symbol used Purpose Example
Addition + Summation of Numbers x = 5 + 6 will give 11

Subtraction - Subtraction of Numbers x = 9 - 5 will give 4

Multiplication * Product of Numbers x = 3 * 4 will give 12

Division / Division of Numbers x = 9 / 3 will give 3.0
Modulus % Return remainder x = 5 % 2 will give 1

Floor Division // Divides and truncates the x = 7 // 2 will give 3
fractional part from result

Exponentiation ** Return base raised to power x = 3 ** 3 will give 27
exponent

Relational Operator: Relational operators are used to describe the relationship
between values or operands. In python, you will use six relational operators to compare
values. These operators are also known as comparison operators.

The six relational operators are:

Operator Example Result
if a=9, b=5

> Greater than a>b True
< Less than a<b False
>= Greater than or equal to a>=b True
<= Less than or equal to a<=b False

== Equal to a==b False
!= Not equal to a!=b True

You can conclude that the result of a comparison operator will always be either True or
False.

Recap of Python of Class VII 33