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# Web Calculator with Python Backend and HTML Frontend

[Web Calculator with Python Backend and HTML Frontend]

[Background]

In today’s world, the ability to perform basic arithmetic operations in real-time is essential for developers and users alike. While many people use traditional calculators, modern web applications offer a powerful way to do calculations instantly, especially with the help of web frameworks and backend processing. This blog post will guide you through creating a simple Python-based web calculator with HTML/JavaScript frontend.

[Approach]

1. Frontend Setup with HTML/JavaScript

  • Use the following HTML structure to create a simple web calculator:
    • Two input fields for user inputs.
    • A button to calculate the sum.
    • A display area to show the result.

2. Backend Processing (Python)

  • Create a Python script that reads the values from the HTML inputs, performs the addition, and displays the result.

[Code Implementation]

Python Backend (Web Calculator)

# Web Calculator with Python backend and HTML frontend

# Get user input
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

# Calculate the sum
result = num1 + num2

# Display the result
print(f"Result is: {result}")

HTML/JavaScript Frontend

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Simple Web Calculator</title>
  <style>
    body { font-family: Arial, sans-serif; }
    #result { font-size: 24px; margin: 10px; }
  </style>
</head>
<body>
  <h2>Simple Web Calculator</h2>

  <input type="number" id="num1" placeholder="First Number" />
  <input type="number" id="num2" placeholder="Second Number" />
  <button onclick="calculate()">Calculate</button>

  <div id="result"></div>

  <script>
    function calculate() {
      const num1 = parseFloat(document.getElementById('num1').value);
      const num2 = parseFloat(document.getElementById('num2').value);
      const result = num1 + num2;
      document.getElementById('result').textContent = `Result is: ${result}`;
    }
  </script>
</body>
</html>

Summary

This simple web calculator demonstrates the ability to:

  • Accept two numbers as inputs.
  • Perform and display the sum.
  • Show the calculation process clearly.

By using Python for backend processing and HTML/JavaScript for the frontend, you can create a fully functional calculator that runs seamlessly in a browser.

[Learning Value]

This project involves:

  • Reading input from HTML elements.
  • Performing arithmetic operations.
  • Displaying results and calculation steps.
  • Handling file operations and data processing.

It provides a solid foundation for further development in web applications, especially for those interested in backend development.

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