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Answer :
To assign the first element of a vector with the value 99, the correct syntax is myVector.at(0) = 99, considering the indexing generally starts with 0. Therefore, the correct answer is : (a).
To assign the vector's first element with the value 99, we need to understand that in many programming languages, vector indexing starts at 0. This means the first element of the vector is at index 0. With respect to the given options, the correct way to perform the assignment would be:
myVector.at(0) = 99;
This syntax follows the standard method of accessing elements in a vector using the .at() function, ensuring you are selecting the proper indexed element. Do note that this is not a universal syntax and depends on the specific programming language and vector implementation one is using. Also, vectors can often use the [] syntax to access elements, such as myVector[0] = 99;. However, the .at() method has the added benefit of bounds checking in some languages like C++.
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