Flubbed it in the second interation through the string: range error... HOW?

The following is my effort to understand how to process a string, letter, by letter:
def myfunc(name):        index = 0    howmax = len(name)    # while (index <= howmax):    while (index < howmax):        if (index % 2 == 0):            print('letter to upper = {}, index {}!'.format(name[index], index))            name = name[index].upper()            print('if block {} and index {}'.format(name[index], index))        elif (index % 2 > 0):            print(index)            print('Start: elseif block, index is {}, letter is {}'.format(index, name))            # print('letter to lower = {}'.format(name[index]))            # print('Already lowercase do noting: name = {}'.format(name[index]))        index += 1        # index = name.upper()        
    return name        
myfunc('capitalism')
Error message:                        Not making sense, index is 1, letter s/b 'a'letter to upper = c, index 0!
if block C and index 0
1
Start: elseif block, index is 1, letter is C
---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
Cell In[27], line 21
     17         # index = name.upper()       
     19     return name       
---> 21 myfunc('capitalism')

Cell In[27], line 8, in myfunc(name)
      6 while (index < howmax):
      7     if (index % 2 == 0):
----> 8         print('letter to upper = {}, index {}!'.format(name[index], index))
      9         name = name[index].upper()
     10         print('if block {} and index {}'.format(name[index], index))

IndexError: string index out of range***************************************************
So, I'm doing something... Stupid!!
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"When you pass through the waters, I will be with you: and when you pass through the rivers, they will not sweep over you. When you walk through the fire, you will not be burned: the flames will not set you ablaze."     
Isaiah 43:2