Python String count()

The string count() method returns the number of occurrences of a substring in the given string.

In simple words, count() method searches the substring in the given string and returns how many times the substring is present in it.

It also takes optional parameters start and end to specify the starting and ending positions in the string respectively.

The syntax of count() method is:

string.count(substring, start=..., end=...)

String count() Parameters

count() method only requires a single parameter for execution. However, it also has two optional parameters:

  • substring - string whose count is to be found.
  • start (Optional) - starting index within the string where search starts.
  • end (Optional) - ending index within the string where search ends.

Note: Index in Python starts from 0, not 1.


Return value from String count()

count() method returns the number of occurrences of the substring in the given string.


Example 1: Count number of occurrences of a given substring

# define string
string = "Python is awesome, isn't it?"
substring = "is"

count = string.count(substring)

# print count
print("The count is:", count)

When you run the program, the output will be:

The count is: 2

Example 2: Count number of occurrences of a given substring using start and end

# define string
string = "Python is awesome, isn't it?"
substring = "i"

# count after first 'i' and before the last 'i'
count = string.count(substring, 8, 25)

# print count
print("The count is:", count)

When you run the program, the output will be:

The count is: 1

Here, the counting starts after the first 'i' has been encountered, i.e. 7th index position.

And, it ends before the last 'i', i.e. 25th index position.