Why does "c" in the for loop is not incrementing?
def solution(s):
for c in range(len(s)):
if s[c] == s[c].upper():
s = s[:c] + ' ' + s[c:]
c += 1
return s
print(solution('helloWorld'))
The output should be "hello World", however, when i add a space " " i also increment the c, but it doesn't works.
Current output is 'hello World'
You can think of:
for c in range(len(s)):
as the c being "set" by the range every loop iteration. The range keeps track of what iteration number it's at.
I think you mean something like this:
def solution(s):
c = 0
while c < len(s):
if s[c] == s[c].upper():
s = s[:c] + ' ' + s[c:]
c += 1
c += 1
return s
This happens because c is automatically re-set on the next iteration, for c in .... In general, you'll have this problem when you try modifying something while you're iterating over it, because the indices won't match up. Here's another example.
You could use a while loop instead, but actually, it's easier to build a new output string:
def solution(s):
out = ''
for c in s:
if c.isupper(): # I also simplified this
out += ' '
out += c
return out
print(solution("helloWorld")) # -> hello World
Although, it's best practice to use str.join() to build strings, like this with a generator expression:
def solution(s):
return ''.join(' '+c if c.isupper() else c for c in s)
print(solution("helloWorld")) # -> hello World
Yes, because you didn't call the function.
