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དཔལ་ལྡན་འབྲུག་གཞུང་། ཤེས་རིག་དང་རིག་རྩལ་གོང་འཕེལ་ལྷན་ཁག།

Department of School Education

Ministry of Education & Skills Development

Python Coding

January 2024

Class IX ICT Curriculum

January 2024

PYTHON

Key stage IV

Class IX

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COMMENTS AND INPUT( )

Key Concept # 7

January 2024

PYTHON

Key stage IV

Class IX

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Concept Overview

Coding Concept	Sub - Concepts
Comments & Input( )	Comments Single line comment Multi-line comment Input function

January 2024

PYTHON

Key stage IV

Class IX

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Explain comments with examples.
Differentiate between single-line and multi-line comments.
Explain the benefits of using comments for effective coding.
Write comments in Python programs to enhance code readability.
Define input function with example.
Explain the purpose of the input( ) function.
Create interactive programs using input() function.

Objectives

January 2024

PYTHON

Key stage IV

Class IX

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COMMENTS

ACTIVITIES

Understanding Comments
Demo 1 - Single Comments
Demo 2- Multi-line Comments
Activity 1 - Displaying Message
Activity 2 - Writing Single and Multi-line Comments

January 2024

PYTHON

Key stage IV

Class IX

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Comments

Comments in coding are lines of text added to explain what the code does.
Comments are not executed as part of the program; they are for human readers.
Comments make the code easier to understand by providing explanations, notes, or reminders.
Comments help other programmers who might need to work with the code later.
Comments are like little messages written directly into the code for better comprehension.

January 2024

PYTHON

Key stage IV

Class IX

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Benefits of Using Comments

Documentation

5

Gives Instruction guide in program

Debugging

4

Comments assist in debugging process

Collaboration

3

Helps team members to understand each other's code

Readability

2

Enhances the code readability

Code Explanation

1

Helps in adding note to explain the code.

Learning and Teaching

6

Makes it easier to understand the code

January 2024

PYTHON

Key stage IV

Class IX

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Types of Comments

There are two types of comments:

Single line comment

Multi-line comment

Comments

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2

January 2024

PYTHON

Key stage IV

Class IX

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Single-line Comments

In the above example, the text “code below adds two numbers” is a single line comment as it is written after the # symbol and is also on the same line.

1 2 3	#code below adds two numbers x,y= 4,5 print(x+y)

Example

Single-line comments start with the # [Hash tag] symbol and everything after it on the same line is considered the comment.

Single-line comments are used for brief explanations on the same line as the code.

January 2024

PYTHON

Key stage IV

Class IX

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Demo - Single-line Comments

1 2 3 4 5 6 7	#variable name stores string value Sonam name = “Sonam” #variable age is assigned with the integer value 16 age = 16 #Displaying the values stored in the variables print(name) print(age)

Code

1 2	Sonam 16

Output

January 2024

PYTHON

Key stage IV

Class IX

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Multi-line Comments

1 2 3 4 5 6 7 8 9 10 11	’’’The code below initialises variable x and y with the value 4 and 5 respectively. Lastly the sum of value stored in x and y variable is displayed using print function’’’ x = 4 y = 5 print(x+y)

Example

Multi-line comments are enclosed within triple quotes (""") and can span across multiple lines.

Multi-line comments are often used for function or module documentation, explaining complex algorithms, or providing detailed insights into code functionality.

9

Output

January 2024

PYTHON

Key stage IV

Class IX

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Demo 2 - Multi-line Comments

1 2 3 4 5 6 7 8 9	’’’The code below initialises variable name and age with the string value Sonam and integer value 5 respectively. In the following code, the value stored in these variables are displayed using print function’’’ name = “Sonam” age = 16 print(name) print(age)

Code

Sonam 16

Output

January 2024

PYTHON

Key stage IV

Class IX

13 of 25

Activity 1 - Displaying Message

Write a Python program to display the message “ Gross National Happiness” and include a single-line comment that explains the purpose of the program.

1 2	#Printing Gross National Happiness print("Gross National Happiness")

Code

Gross National Happiness

Output

January 2024

PYTHON

Key stage IV

Class IX

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Activity 2 - Writing Single and Multi-line Comments

Write a Python program to welcome a student to coding. Include comments, both single-line and multiline to provide clear explanations of the program.

1 2 3 4 5 6 7	’’’Program to welcome students with their name and class to the world of coding.’’’ name = "Pema Khandu" #Store a person's name Class = IX #Store their grade print("Welcome to Python Programming!")#Greeting print("Name:",name) #Printing name print("Class:",Class) # Printing grade

Code

Welcome to Python Programming! Name:Pema Khandu Class:9

Output

January 2024

PYTHON

Key stage IV

Class IX

15 of 25

INPUT FUNCTION

ACTIVITIES

Understanding Input Function
Demo 1 - Entering Favourite Subject and Ambition
Activity 1 - Requesting for a Name
Activity 2 - Displaying Subject Marks

January 2024

PYTHON

Key stage IV

Class IX

16 of 25

Input Function

input() function is used to get information from the user while the program is running.
You can ask the user for different types of information, like their name or age.
Whatever the user types is stored as text (string data type), even if it looks like a number or some other data.
input() function works by displaying a message to the user, then waiting for them to type something and press Enter.

January 2024

PYTHON

Key stage IV

Class IX

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Input Function

1 2	name = input(“Enter your Name:”) print(f’My name is {name}’)

Example

Enter your Name: Sonam My name is Sonam

Output

1 2 3 4	num1 = int(input("Enter 1st No: ")) num2 = int(input("Enter 2nd No: ")) sum = num1 + num2 print(f"The Total is {sum}”)

Example

Enter 1st No:34 Enter 2nd No:3 The Total is:37

Output

January 2024

PYTHON

Key stage IV

Class IX

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Importance of input() function

Support basic user authentication, data validation, and dynamic behavior based on user input.

Facilitate the creation of interactive and dynamic Python programs.

Enable user input for various purposes, including data collection, user responses, and program customization.

Helps to gather information interactively from the user during program execution.

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2

3

4

January 2024

PYTHON

Key stage IV

Class IX

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Demo 1 - Entering Favourite Subject and Ambition

Write a Python program that asks the user to input their preferred subject and career ambition, stores the information in variables, and then prints the entered values.

1 2 3 4	fav_subject = input(“enter your favourite subject”) ambition = input(“enter your ambition”) print(“Your favorite subject is ”,fav_subject) print(“Your career ambition is ”,ambition)

Code

Your favorite subject is ICT Your career ambition is Data Analyst

Output

January 2024

PYTHON

Key stage IV

Class IX

20 of 25

Activity 1 - Requesting For a Name

A Python program asks the users to enter their name and then displays the name on the screen.

Write the solution in your notebook for the above program.
Test the codes in the Python IDLE.
Make changes to the code if there are errors(debugging).

1 2 3	name = input('Please enter your name:') #let us assume that you have entered “Dechen” print(name)

Code

Please enter your name: Dechen Dechen

Output

January 2024

PYTHON

Key stage IV

Class IX

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Activity 2 - Displaying Subject Marks

Write a Python program to ask the user to enter the marks of following subjects and display it accordingly:

English
Dzongkha
Maths
Science
HCG
Economics

January 2024

PYTHON

Key stage IV

Class IX

22 of 25

Activity 2 - Solution

1 2 3 3 4 5 6 7	eng = input('Enter English mark: ') dzo = input('Enter Dzongkha mark: ') maths = input('Enter Maths mark: ') sci = input('Enter Science mark: ') hcg = input('Enter HCG mark: ') eco = input('Enter Economics mark: ') print('Your Marks are as follows: ') print(f“English: {eng}\n Dzongkha:{dzo}\n Maths: {maths}\n Science: {sci}\n HCG: {hcg}Economics: {eco}”)

Code

Enter English mark: 89 Enter Dzongkha mark: 70 Enter Maths mark: 99 Enter Science mark: 89 Enter HCG mark: 89 Enter Economics mark: 90 Your Marks are as follows: English: 89 Dzongkha:70 Maths:99 Science: 89 HCG: 89 Economics: 90

Output

January 2024

PYTHON

Key stage IV

Class IX

23 of 25

Comments are used to provide explanations to the code for better understanding.
Single-line comments are for brief remarks on a single line that begins with # symbol.
Multi-line comments are enclosed within triple quotes (""") and can span across multiple lines.
Comments are not executed as part of the program; they are for human readers.
Comments facilitate collaboration among programmers, allowing for easier understanding of code written by others.

Key Points

January 2024

PYTHON

Key stage IV

Class IX

24 of 25

input() function is used to get information from the user while the program is running.
In input() function, whatever the user types is stored as text (string data type), even if it looks like a number or some other data.
input() function works by displaying a message to the user, then waiting for them to type something and press Enter.
We use the input() function in programming to interact with the user and collect data or information while the program is running.

Key Points

January 2024

PYTHON

Key stage IV

Class IX

25 of 25

བཀྲིན་ཆེ།

THANK YOU

January 2024

PYTHON

Key stage IV

Class IX