Question

In Python, write a function (name: identiSubstring) that, given a string S, returns an integer that represents the number of ways in which we can select a non-empty substring of S where all of the characters of the substring are identical. Two substrings with the same letters but different locations are still considered different. For example, the string "zzzyz" contains 8 such substrings. Four instances of "z", two of "zz", one of "zzz", and one instance of "y". String "k" contains only one such substring: "k". The length of S will be between 1 and 100, inclusive. Each character in S will be a lowercase letter (a-z).

          In Python, write a function (name: identiSubstring) that, given a string S, returns an integer that represents the number of ways in which we can select a non-empty substring of S where all of the characters of the substring are identical. Two substrings with the same letters but different locations are still considered different. For example, the string "zzzyz" contains 8 such substrings. Four instances of "z", two of "zz", one of "zzz", and one instance of "y". String "k" contains only one such substring: "k". The length of S will be between 1 and 100, inclusive. Each character in S will be a lowercase letter (a-z).

Added by David H.

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