Help me in solving PYTH99A problem

My issue

Please explain me this problem…

My code

# Count how many 'o's are present in the string using a 'for' loop and 'if' condition

string = 'bolloon'

# use this variable to count occurrences of o
count_o = 0      
for i in string:
    if i == 'o':
        increase count_o by 1 
            count_o += 1

Learning course: Learn Python
Problem Link: CodeChef: Practical coding for everyone

@pawankumar1245
U have to count the number of ‘o’ in the string and then print the count.
Refer the following code for better understanding.

# Solution as follows

string = 'bolloon'

# use this variable to count occurrences of o
count_o = 0      

for i in string:
    if i == 'o':
        # iterate through the string, everytime you find an 'o', increase count_o by 1
        count_o = count_o + 1

print(count_o)