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What is the difference between the front() and begin() functions that appears in many STL containers?
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vector::begin() and vector::end() in C++ STL vector::begin() function is a bidirectional iterator used to return an iterator pointing to the first element of the container.
vector::begin() begin() function is used to return an iterator pointing to the first element of the vector container. begin() function returns a bidirectional iterator to the first element of the container.
std::vector::frontReturns a reference to the first element in the vector. Unlike member vector::begin, which returns an iterator to this same element, this function returns a direct reference.
vector::front() This function can be used to fetch the first element of a vector container.
begin() returns an iterator that can be used to iterate through the collection, while front() just returns a reference to the first element of the collection.
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