rfind() method returns the highest index of the substring if found in given string. If not found then it returns -1.
str.rfind(sub, start, end)
sub : It’s the substring which needs to be searched in the given string.
start : Starting position where sub is needs to be checked within the string.
end : Ending position where suffix is needs to be checked within the string.
NOTE : If start and end indexes are not provided then, by default it takes 0 and length-1 as starting and ending indexes where ending indexes is not included in our search.
Return : Returns the highest index of the substring if it is found in given string; if not found, then it returns -1.
ValueError : This error is raised in the case when the argument string is not found in the target string.
Substring 'geeks' found at index : 10 Substring 'for' found at index : 6 Substring 'ate' found at index : 13
10 10 -1 6
Practical Application :
Useful in string checking. To check if given substring is present in some string or not.
Doesn't contains given substring
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