triangle

program HelloWorld;
var i,j,n: integer;

begin
    n := 10;
    for i:=0 to n do
        begin
            for j:=0 to n do
                begin
                if (i+j) >= (n) then
                    begin
                        write('* ');
                    end
                else
                    begin
                        write('  ');
                    end
                end;
                writeln();
        end;
end.