Definition:Vector Length

Definition
The length of a vector $\mathbf v$ in a vector space $\struct {G, +_G, \circ}_K$ is defined as $\norm V$, the norm of $V$.

Also denoted as
$\size V$ is sometimes also seen for the length of $V$, although this is not recommended since it can lead to confusion with absolute value.

Also see

 * Distance Formula