Function: digits
Section: conversions
C-Name: digits
Prototype: GDG
Help: digits(x,{b=10}): gives the vector formed by the digits of x in base b (x and b
 integers).
Doc:
 outputs the vector of the digits of $|x|$ in base $b$, where $x$ and $b$ are
 integers ($b = 10$ by default). See \kbd{fromdigits} for the reverse
 operation.

 \bprog
 ? digits(1230)
 %1 = [1, 2, 3, 0]

 ? digits(10, 2) \\ base 2
 %2 = [1, 0, 1, 0]
 @eprog\noindent By convention, $0$ has no digits:
 \bprog
 ? digits(0)
 %3 = []
 @eprog
