#Strings are not mutable

l = [1, 2, 3]
print(l)

l[1] = 1
print(l)


#Recall we can treat a string as a list

word = 'Lucas' #clearly misspelled

print(word[3]) #AH, that offending "A"

#Let's replace it
#word[3] = 'u'

#strings are immutable.  i.e. you cannot update letters via index referencing.
#so how would we?

#Can always convert it to a list, do the update then update back to a string.
wordarray = list(word)
wordarray[3] = 'u'
wordupdate = ''.join(wordarray)
print(wordupdate)