if $i$ is a number then what is its numerical value? $ i $ is the unit imaginary part of complex number , but  there is a question which it is mixed me probably i missed the definition of a number , wolfram alpha $ i $ is assumed to be a number , and others assumed it to be  variable because it satisfies $ \sqrt{i^2}$ =$+i$ or  $-i $   then my question here :
Question:
Is $i$  a number then what is it's value ?

Asking what's the value of $i$ is like asking what's the value of $2$. And, just like $i^2$ has two square roots, $i$ and $-i$, $2^2$ has two square roots, $2$, and $-2$.
And yes, it is a number, not a variable.
