Python String rindex() Method Last Updated : 07 Jan, 2025 Comments Improve Suggest changes Like Article Like Report Python String rindex() method returns the highest index of the substring inside the string if the substring is found. Otherwise, it raises ValueError.Let's understand with the help of an example: Python s = 'geeks for geeks' res= s.rindex('geeks') print(res) Output10 Note: If start and end indexes are not provided then by default Python String rindex() Method takes 0 and length-1 as starting and ending indexes where ending indexes is not included in our search.Table of ContentSyntax of rindex() rindex() with start or end indexrindex() without start and end indexErrors and ExceptionsSyntax of rindex() string.rindex(value, start, end)Parameters:value : Part that we are searching for.start (optional): Index where the search begins (default is 0).end (optional): Index where the search ends (default is the string’s length).Return: It returns the highest index of the substring inside the string if substring is found. Otherwise it raises an exception.rindex() with start or end indexIf we provide the start and end value to check inside a string, Python String rindex() will search only inside that range. Example: Python a= "ring ring" # checks for the substring in the range 0-4 of the string print(a.rindex("ring", 0, 4)) # same as using 0 & 4 as start, end value print(a.rindex("ring", 0, -5)) b = "101001010" # since there are no '101' substring after string[0:3] # thus it will take the last occurrence of '101' print(b.rindex('101', 2)) Output0 0 5 rindex() without start and end indexIf we don't provide the start and end value to check inside a string, Python String rindex() will search the entire string . Example: Python a = "ring ring" # search for the substring, # from right in the whole string print(a.rindex("ring")) b = "geeks" # this will return the right-most 'e' print(b.rindex('e')) Output: 52Errors and ExceptionsValueError is raised when the substring is not found within the specified range or the entire string.Example: Python s = 'geeks for geeks' res = s.rindex('pawan') print(res) Exception:Traceback (most recent call last): File "/home/dadc555d90806cae90a29998ea5d6266.py", line 6, in res= s.rindex('pawan')ValueError: substring not found Comment More infoAdvertise with us Next Article Python String rindex() Method P pawan_asipu Follow Improve Article Tags : Misc Python python-string Practice Tags : Miscpython Similar Reads Python String isidentifier() Method The isidentifier() method in Python is used to check whether a given string qualifies as a valid identifier according to the Python language rules. 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