Variables and Operators - Exercises

What you'll learn

In this activity, you will:

• Create variables with different data types (string, integer, float, boolean)
• Use meaningful variable names
• Perform mathematical operations with variables
• Get user input and convert data types
• Calculate real-world values using Python

Total Time: 30-40 minutes

Getting Started

:information_source: Important Click the link here and make a copy of Colab Notebook into your Google Drive for coding.

:computer: Question One: Creating Different Data Types

Time: 10 minutes

Create 4 variables with different data types. Follow these steps:

1. Create a string variable (text)
2. Create an integer variable (whole number)
3. Create a float variable (decimal number)
4. Create a boolean variable (True/False)

:bulb: Use meaningful variable names that describe what the data represents. For example, user_age is better than just a.

Example of string data types

python

user_name = "Yong Sheng"
print(type(user_name))

Expected output:

arduino

<class 'str'>

Example of integer data types

python

weight_in_kg = 70
print(type(weight_in_kg))

Expected output:

arduino

<class 'int'>

Example of float data types

python

height_in_m = 1.75
print(type(height_in_m))

Expected output:

arduino

<class 'float'>

Example of boolean data types

python

gender_male = True
print(type(gender_male))

Expected output:

arduino

<class 'bool'>

:computer: Question 2: Calculate Average Scores

Time: 10 minutes

You are a class teacher who needs to calculate the average scores for 3 subjects.

Follow these steps:

1. Create three variables in one line: subject1, subject2, subject3
2. Assign different scores to each subject (you choose the values)
3. Calculate the average using the formula: (subject1 + subject2 + subject3) / 3
4. Print the result tip Hint You can create multiple variables in one line like this:

a, b, c = 10, 20, 30

:computer: Advanced Question: Salary Calculator

Time: 15 minutes

You are a company's CEO creating a salary calculator for your employees.

Write a program following these steps:

1. Ask for the employee's name using input() and store it in variable name
2. Ask for the employee's ID number and store it in variable id
3. Ask for working hours and store it in variable hours
4. Ask for rate per hour and store it in variable rate_per_hour
5. Convert the hours and rate to integers using int()
6. Calculate the pay using this formula:

pay = int(hours) * int(rate_per_hour)

7. Print the employee information and calculated salary

:bulb: Testing Values Try with these test values:

• Hours: 50
• Rate per hour: 7

Expected output:

The employee name is: Adibah
The employee ID number is: 123456
The amount of salary need to pay is: RM350

Troubleshooting

Common Issues:

1. TypeError when calculating

   • Make sure to convert input values to integers using int()
   • Input always returns a string, even if you type numbers

2. NameError: variable not defined

   • Check your variable spelling
   • Make sure you created the variable before using it

3. Wrong calculation results

   • Check your mathematical operators
   • Remember: division uses /, multiplication uses *

:emoji:️ Submission

:warning: Important Before submitting:

• Test all your code in the Colab notebook
• Make sure all outputs match the expected results
• Save your Colab notebook to your Google Drive

:link: Submit your exercise here

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