Python - 056 : count(), find(), index() and rindex() functions in python #pythontutorial #python

Python String count()

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

message = 'python is popular programming language'

# number of occurrence of 'p'

# Output: Number of occurrence of p: 4

Python String find() method

Python String find() method returns the lowest index or first occurrence of the substring if it is found in a given string. If it is not found, then it returns -1.

Parameters:

sub: Substring that needs to be searched in the given string.
start (optional): Starting position where the substring needs to be checked within the string.
end (optional): End position is the index of the last value for the specified range. It is excluded while checking.
Return: Returns the lowest index of the substring if it is found in a given string. If it’s not found then it returns -1.

5 Ways to Find the Index of a Substring in Python