How put a element in a particular index of a list

Question

List = ['y', 'i', 't']
If i want List [2] = u?

Answer 1

List.insert(1, 'u')

Answer 2

Are you tried that way.. ?
Try it once.. Result?

edit: ?
yes. it works list allows indexing and it is mutable or modifiable.

edit:
List = ['y', 'i', 't']
print(List)
List [2] = 'u'
print(List)

Answer 3

If b= 'u'
Can i replace like
l[2] = b
?

Answer 4

Of course
lists are mutable
but tuples aren't
so you can

Answer 5

Experiment in playground. If something goes wrong, you can ask here...
if b == 'u' : l[2] = b