python how the print output, removing the last comma

　　In just learning python in encountered a problem that the output string of numbers, separated by semicolons, but do not need the last comma,

At this point how to do it?

　　print (i, end = ',') in this way there will be a final extra comma

　　As a white, I found two ways, of course, with the back of the in-depth study, there may be many ways with, here only to record their

The study, to facilitate later review:

1. Add the contents back to define an empty string, then will input comma, and connected, the final output:

s = ''
for i in range(100, 110):
    s  += '{},'.format(i)

print(s[:-1])

 

2. definition list, then the contents of the list to be output is stored, is connected to the last comma:

s = []
for i in range(100, 110):
    s.append(str(i))
print(','.join(s))

Note: i use str converted into characters