Python Learning – Day 2: Operators and Real-Life Calculations

Introduction

Welcome to Day 2 of my Python learning journey.
In this lesson, I learned how Python performs mathematical calculations using operators.

Operators are very important in programming because almost every real-world application involves calculations such as bills, salary, discounts, and expenses.

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📚 Topics Covered in Day 2

In this lesson, I learned:

• What are operators in Python
• Arithmetic operators
• How Python performs calculations
• Real-life examples like shopping bills and discounts

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🧮 What Are Operators in Python?

Operators are symbols that perform operations on values and variables.

Python operators help us to:

• Add numbers
• Subtract values
• Multiply quantities
• Divide amounts
• Find remainders

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🔢 Arithmetic Operators in Python

Operator	Purpose	Example
+	Addition	10 + 5
-	Subtraction	10 – 5
*	Multiplication	10 * 5
/	Division	10 / 5
%	Modulus (remainder)	10 % 3

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🏪 Real-Life Example: Shopping Bill

Let’s calculate the total cost of buying rice.

Python Code Example:

rice_price = 60
quantity = 3

total_price = rice_price * quantity
print("Total price =", total_price)

Output:

Total price = 180

This example is similar to calculating a bill in a grocery store.

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🏷️ Discount Calculation Example

Now let’s apply a discount to the total price.

Python Code:

rice_price = 60
quantity = 3
discount = 5  # percent

total_price = rice_price * quantity
final_price = total_price - (total_price * discount / 100)

print("Rice price =", rice_price)
print("Quantity =", quantity)
print("Total price =", total_price)
print("Discount =", discount, "%")
print("Final price after discount =", final_price)

Output:

Rice price = 60
Quantity = 3
Total price = 180
Discount = 5 %
Final price after discount = 171.0

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🔍 Modulus Operator (%) – Real-Life Meaning

The modulus operator % returns the remainder after division.

Example:

print(10 % 3)

Output:

1

Real-Life Use Case:

If 10 items are divided among 3 people, 1 item will remain.

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🌍 Why Operators Are Important?

Operators are used everywhere in real-world applications:

• Shopping and billing systems
• Salary calculation
• Expense tracking
• Banking applications

Without operators, programming would not be possible.

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✅ What I Learned Today

• How Python performs calculations
• How to use arithmetic operators
• How to calculate bills and discounts
• How Python helps in real-life problem solving

This lesson helped me understand how Python works like a smart calculator.

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🔜 Next Lesson (Day 3)

In Day 3, I will learn about:

• Strings in Python
• Taking user input using input()
• Creating simple interactive programs

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📢 Final Note

This Python learning series is designed for beginners.
Anyone who wants to learn Python step by step can follow these posts.

Thank you for reading 🚀