for easier understanding

what if the char value is equal to 5 and your code will follow into else condition, I think it is better to use else if instead

Same way I ended up doing it too.

I like this one

Its beautiful.

Equal , good

Hard to read

very understandable

I do not see right solutions, if we have class points without yours.
We need to add to class points your points and devide this sum by classPoints.length + 1.

You can make your code shorter by using template literals instead of concatenating it with + operator

Thanks!

I solved this the same way except i converted the numberString.charAt(i) to an int before using it in the if statment and used the 5 as an int. I did not think that it would know what to do with the 5 as a char. Clearly I did not need to do that. I guess my question is how does java know?

Well done solution.
Also just return while check.

This is pretty cool. Good job.