Greetings! For starting in coding, I suggest you to start with lower kyu's problems, such as 8kyu. But if you want to continue to solve this problem, try doing:

list = [3, 45, 21]
print(max(list)) # In here we used the max() function to calculate the highest number in an array / list.

I hope this helps!

Hello! I didn't understand your point very well, but think I have a main idea of what you are referring to. You are trying to avoid the user writing code in capitals leters? I don't get it, actually.

Is this avalaible on Python? Try adding multiple languages.