function value = ch_is_upper ( c )

%% CH_IS_UPPER returns TRUE if C is a uppercase alphabetic character.
%
%  Modified:
%
%    01 May 2004
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, character C, a character to check.
%
%    Output, logical VALUE is TRUE if C is an uppercase alphabetic character.
%
  FALSE = 0;
  TRUE = 1;

  if ( 'A' <= c & c <= 'Z' ) 
    value = TRUE;
  else
    value = FALSE;
  end