This article discusses which one to use when and why. Just like find(), index()method determines the position at which a substring is first found in a string. 05:56 It's best that I show you an example: By my understanding, the value of line.find is okay, but the value of line.rfind should be 9. The primary difference between it and .find() is instead of returning -1, it will raise an exception. 2. rfind(string, beg, end) :- This function has the similar working as find(), but it returns the position of the last occurrence of string. Again, it will return True if the string starts with the specified prefix, or False otherwise. 06:42 It returns first occurrence of string if found. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 1. find ("string", beg, end) :- This function is used to find the position of the substring within a string.It takes 3 arguments, substring , starting index ( by default 0) and ending index ( by default string length) . You can leave out the end point, and it will simply start and go all the way to the end. Python String Methods | Set 1 (find, rfind, startwith, endwith, islower A Computer Science portal for geeks. Ltd. # Finding last position of val in txt using rfind(), 'The last position of "{}" in "{}" is {}. PYTHON : What's the difference between --find-links and - YouTube The original string is : geeksforgeeks The character occurrence difference is : 8 Method #2: Using find () + rfind (): The combination of above functions can be used to solve this problem. Youll learn how to use the Python .rfind() method, how to use its parameters, how its different from .rindex(), and how to use the method to see if a substring only exists once in a string. The reason behind this is that if the index of the first and the last instance of a substring is the same, then the substring only exists a single time.

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