Learn How to Build a Python Flask Calculator in Just Minutes!

Python Flask is a popular web framework that allows you to build web applications quickly and easily. In this tutorial, we will show you how to create a simple calculator using Python Flask.

To get started, make sure you have Python installed on your computer. You can download Python from the official website if you don’t already have it installed. Once you have Python installed, you can install Flask by running the following command in your terminal:

pip install Flask

Now that you have Flask installed, create a new Python file called app.py and add the following code to it:

from flask import Flask, request, render_template

app = Flask(__name__)

@app.route('/')
def calculator():
    return render_template('calculator.html')

@app.route('/calculate', methods=['POST'])
def calculate():
    num1 = int(request.form['num1'])
    num2 = int(request.form['num2'])
    operation = request.form['operation']

    if operation == 'add':
        result = num1 + num2
    elif operation == 'subtract':
        result = num1 - num2
    elif operation == 'multiply':
        result = num1 * num2
    elif operation == 'divide':
        result = num1 / num2
    else:
        result = 'Invalid operation'

    return f'The result is: {result}'

if __name__ == '__main__':
    app.run()

Next, create a new HTML file called calculator.html and add the following code to it:

    


    
Calculator
    
        
        
            +
            -
            *
            /
        
        
        
    

That’s it! You have now created a simple calculator using Python Flask. To run the application, open your terminal and navigate to the directory where your app.py file is located. Then, run the following command:

python app.py

Open your web browser and navigate to http://localhost:5000 to see your calculator in action. You can now perform simple arithmetic operations on the calculator and get the result instantly.

Congratulations! You have successfully built a Python Flask calculator in just minutes. Feel free to customize the calculator further by adding more functionality or styling to it. Happy coding!