List iteration

[perfringo]

I do not know how to make for loop and put on square.
does annybody can give me instruction ,to learn something

Fire up your Python interactive interpreter and type help('for'), this way you learn how for-loop is operating. Next step could be entering help(str.split) to understand how this method is working and what arguments can be passed (to exit help press Q).

But before you start all this you should articulate the 'algorithm' how to achieve objective. I personally would do something like this:

- how to split string into digits
- how to convert digits in str datatype into integers
- how to square integers
- how to construct string from squared integers