Page 299 - AI Ver 1.0 Class 9
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Output:
Enter Length : 5
Enter Breadth : 10
Area is : 50
Perimeter is : 100
Task Experiential Learning
Type "import this" in your Python IDLE and you will find a poem written by Tim Peters, a major contributor
to the Python community.
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Task Subject Enrichment
Input a radius of a circle. Calculate the area and perimeter of circle.
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Selection Statements
In Python,
• Selection flow of control is achieved through conditional statements.
• In the conditional/selection statements, flow of control is changed based on a condition. We specify the
condition in the program which evaluates to either True or False.
• If condition is True then the block of statement written for True will be executed and in case the condition is
False then the block of statements for False will be executed.
• Conditional statements are also called as branching statements as a program decides which statement to
execute based on the result of the evaluated condition.
• A block is identified by using an indentation (minimum 1 space). Ensure that all statements in one block are
indented at the same level.
• Python mainly provides three types of conditional statements—if, if…else and if…elif…else statements.
Let us learn about them in detail.
Introduction to Python 297

