Old BASIC, what does the line ... 99 ON 100+V*7 ... do?

Question

Programming

I have been given the task of translating an old BASIC program into something more modern, but here's the catch, I just don't understand what the expression underlined with a red line means.
Thank you in advance for your help!

Answer 1

This is wrong, first of all, you need to find out which specific compiler, and find it and bring it into working condition, this will facilitate the process, besides how will you test the code without it?
99 is the line number, you need to understand what the ON. Search here:
https://en.wikipedia.org/wiki/BASIC#Typical_BASIC_...
www.qb64.net/wiki/index.php/Keyword_Reference_-_Al...
But it may not be there, once again, find out Basic dialect.