Update main.py

[shayaanyar]

The clear function is enhanced to make it machine independent by adding clear and cls attributes. Before, it was only working on windows but now it can work on all operating systems. I also reduced the repetition of the time and added it to the last in a way that it functions the same way but it is now concise and precise. It also increased readability.

Type of change

• New features by making it machine independent
• Simplify the code by reducing repetition

Changes proposed in this pull request

• Project name : Calculator

• Short description :

• Simplify the code

• Enhance the function

Checklist

• The code is Python 3 compatible
• I have added relevant comments in my file to make code understandable
• I have added my project in a folder which includes all the necessary files

[github-actions]

Greetings! This is an automated message from GitHub Actions. 🤖
Your pull request has been received and is awaiting for a review by the repository owner or a maintainer. This may take some time, so please be patient.
While you wait, you can continue to work on other issues or pull requests, or explore the project further. Or you can simply relax and enjoy your day.
Thank you for your contribution to this project! You are awesome! ⭐

[shayaanyar]

This modifies the code to make it short, precise and machine independent

[Mrinank-Bhowmick]

Thanks for your contribution ⭐