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A substring is a subset or part of another string, or it is a contiguous sequence of characters within a string. For example, "Substring" is a substring of "Substring in Java."
Approach: The count of sub-strings of length n will always be len – n + 1 where len is the length of the given string.
For a string of length n, the formula to compute all the substrings are: n(n+1)/2 Can someone help me out in intuitively understanding this formula?
Wikipedia says: "The number of substrings of a string of length where symbols only occur once, is the number of ways to choose two distinct places between symbols to start/end the substring"
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