ConTeXt: arbitrary Unicode code point

Question

How to print a glyph by Unicode code point? i.e. what is the ConTeXt equivalent of the following LaTeX (displaying a capital Alpha):

\symbol{"0391} % hex
\symbol{913}   % dec
\symbol{'1621} % oct

Answer 1

The following works in plain TeX, thus also in ConTeXt:

  \char"0391 % hex
  \char913   % dec
  \char'1621 % oct