How to get char from string by index?

Question

Lets say I have a string that consists of x unknown chars. How could I get char nr. 13 or char nr. x-14?

Answer 1

I think this is more clear than describing it in words

s = 'python'
print(len(s))
6
print(s[5])
'n'
print(s[len(s) - 1])
'n'
print(s[-1])
'n'