Answer :
The correct way to assign the value 99 to the first element of a vector in C++ is using 'myVector.at(0) = 99', since vector indexing starts at 0 in C++. the correct answer is option c. myVector .at(0) = 99;
When dealing with vectors in programming, it's important to recognize that indexing often starts at 0. In many programming languages, including C++ which uses the std::vector container, the first element is located at index 0. Given the code snippet vector
It's important not to confuse vector indexing in programming with some mathematical vector notations where the initial index might start at 1. Furthermore, trying to access a vector with a negative index, such as myVector.at(-1), will throw an out_of_range exception because it's not a valid index. Option 'b' in the provided question is therefore incorrect, as is the misunderstanding that vector indexing starts at 1, which would make 'd' incorrect. The correct answer is 'c. myVector.at(0) = 99'. the correct answer is option c. myVector .at(0) = 99;
