How to write the code defining prime numbers

Answer 1

I got these from code playground, I hope they help:
https://code.sololearn.com/cZ0JNAfo92re/?ref=app
https://code.sololearn.com/c6933cbu5jrZ/?ref=app
https://code.sololearn.com/cuJofI7I6AFe/?ref=app

There are many more examples you can refer to in code playground

Answer 2

ha kacha

Answer 3

https://code.sololearn.com/cab9xV4l2U22/?ref=app