# How to find absolute value of a vector in this

How to find absolute value of a vector in this question?
a = {1, 3, 5}
Then in formulas see this |a|
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Lynne Trussell
Absolute value of a vector means taking second norm of the vector i.e. ∥x∥. That means the same thing as
$\sqrt{{x}_{1}^{2}+{x}_{2}^{2}+\dots +{x}_{n}^{2}}$
I don't understand why some top researchers in computer science abuse the notation where |x| is widely used for absolute value of scalars in math.
I have also seen papers using |x| to mean absolute value of each component of the vector x. In summary, meaning will depends upon the context and author.

Keep in mind that absolute value is distance from zero. So you can use the distance formula to find the absolute value:
$\sqrt{{x}^{2}+{y}^{2}+{z}^{2}}$