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Learn how to build a simple calculator in Python that acts as a 'Number Wikipedia' using a for loop to display various mathematical operations.
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Building a Simple Calculator in Python

Creating a simple calculator that provides detailed information about numbers can be an enjoyable coding experience. If you're a Python enthusiast looking to make a handy tool that not only performs arithmetic operations but also showcases them in a user-friendly manner, you've come to the right place! In this guide, we'll guide you through building a basic calculator using Python and a for loop to execute multiple operations.

Understanding the Challenge

The goal is to create a 'Number Wikipedia' that allows users to input two numbers. The calculator will then perform a series of operations on these numbers — including addition, subtraction, multiplication, division, and squaring — and display the results.

In your initial attempt, you've created a function to list the operations but haven't yet calculated the results. Let’s address this issue using a simple yet effective approach.

The Initial Code

Here’s the code you’ve started with:

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In this code snippet, you define a function number_wikipedia that takes two parameters, x and y, and initializes a list ops containing the operations you want to perform: addition, subtraction, multiplication, and division. A for loop iterates over these operations, and for each iteration, it prints the operation without calculating the result.

Adding Functionality to Calculate Results

To extend your function and print the actual results of these operations, we can utilize Python's built-in eval() function. The eval() function evaluates a string as a Python expression, which allows us to execute mathematical operations dynamically.

Revised Code Example

Here’s the modified version of your function that includes the calculation of results:

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Code

Using eval(): By passing a formatted string to eval(), we execute the mathematical expression corresponding to the current operation.

Formatted String Output: Each result is printed in a clear format that shows the calculation and its result.

Example Usage

To see this in action, you can call your function with two numbers:

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This call will produce the output:

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Conclusion

Creating a simple calculator using Python can be both fulfilling and instructive. By leveraging for loops and the eval() function, we've built a tool that acts as a 'Number Wikipedia', providing a quick reference for basic arithmetic operations. You can further enhance this calculator by integrating more functions, like squaring the numbers or even using error handling for division by zero.

Get started with your calculator today, and let your creativity run wild as you explore what else you can add!