The most reasonable place would be either at the top before main() or inside of main(). It is possible to do this inside the functions that use them, but that doesn't make much sense to do, since it would not offer any advantage over using literal values if done that way.
#Need help 4.3.5 creating your own plant CodeHs
shadow kernel
Also, this code has nested functions, which is completely legal, but it is not something commonly done intentionally at your point in the learning process.
chrome steeple
oh
What const variable should I create I don't want it to affect my code too much?
shadow kernel
What const variable should I create I don't want it to affect my code too much?
They tell you exactly consts for what.
chrome steeple
thank you for your help
visual umbra
Hey random question because I am curious: Are you using CodeHS through a real school or online bootcamp or something similar? Just curious how that platform works, it wasn't 100% clear to me on their website.
chrome steeple
I'm using CodeHS through Online Summer School
shadow kernel
I'm using CodeHS through Online Summer School
I noticed the use of capitalization. Is Online Summer School the name of a specific online school?
chrome steeple
Oh no just a grammer error
shadow kernel
Is it affiliated with a regular school?
chrome steeple
yes
visual umbra
Thanks for clarifying! 
Good luck with the rest of your program! Don't hesitate to post again if you encounter more issues.