There is almost never an "IF". All non-zero vectors have a constant, specified direction. Only a zero-vector has a direction which is unspecified.
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NULL VECTOR::::null vector is avector of zero magnitude and arbitrary direction the sum of a vector and its negative vector is a null vector...
Then the resultant vector is reversed.
Vector multiplication is one of several techniques for the multiplication of two vectors with themselves. A vector has a magnitude and direction.
... then what is the question?
A vector has magnitude and direction, so since it is up it is vector.