Trying to write func("abcd") -> "abbcccdddd"

[omm]

def tag(s):
    count = len(s)
    for i in range(count): 
        res = f"{s[:1]}{''.join([char*2 for char in s[1:]])}"
    return res
 
 
print(tag("Tom"))

Thanks for the quick response. The code you have suggested seems to print all letters twice other than the first letter. looks like we are joining the first character

{s[:1]}

with twice

char*2

every other character

for char in s[1:]