how does the count function work in python code example

Example 1: python count

Format: string.count(sub, start= 0,end=len(string))
string =  "Add Grepper Answer"
print(string.count('e')
>>> 3

Example 2: count in python

it counts the number of elements in the list or in the string(words)

Example 3: what is the use of count function in python

count = 0 
while count < 10 :
  print("Hello")
  count += 1