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CONDITIONAL
09 STATEMENTS IN PYTHON
Your Aim
to learn about:
Decision Making Statements The if Statement
The if…else Statement Nested if Statement
The if…elif…else Ladder
There are situations in life where we must make decisions based on the circumstances. For
example, if it rains, we will stay at home, or else we will visit the market. Similar situations arise
in programming as well, where we need to make some decisions and, based on these decisions,
execute a set of commands. Whether the outcome is true or false, we must decide which action to
take and which statement to execute. In this chapter, we will learn about conditional statements
in Python.
DECISION MAKING STATEMENTS
Start
Conditional statements, also known as decision-making or
control flow statements, are used in programming to execute
False
different blocks of code based on certain conditions. The if condition
following Decision Making Statements are available in Python:
True
if statement
Statements in if block
if...else statement execute
Nested if statement
Stop
if…elif…else ladder
THE IF STATEMENT
The if statement is the simplest conditional statement. In case of the if statement, a statement or
a collection of statements within the if block is executed only if a certain condition or expression
evaluates to True. If the condition evaluates to False, then the control of execution is passed to
the next statement after the if block. The syntax of the if statement is given below:
Syntax:
if (Test Expression):
Conditional Statements in Python 89

