Theindex -1represents the last character of a string.In manyprogramminglanguages, strings are represented as arrays of characters. Each character in a string is assigned an index, starting from 0 for the first character. The index -1 is used to refer to the last character of a string.By using the index -1, programmers can conveniently access or manipulate the last character of a string without needing to know the exact length of the string. This is particularly useful when dealing with dynamic or variable-length strings.For example, if we have a string "Hello" and we want to retrieve the last character 'o', we can use the index -1. In most programming languages, the expression str[-1] would return the last character of the string.It's important to note that not all programminglanguagessupport negative indexing. Some languages start indexing from 1 or have other conventions for accessing the last character of a string. Therefore, it's crucial to consult the specific language's documentation or reference to understand how indexing works.Learn more aboutindex -1brainly.com/question/33234408#SPJ11...

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