What is str in pascal

Question

Give me expansion if str (x,y) ;
D =12 and n = 4
procedure haha(d:string);
var i:integer;
tmp:string;
begin
if (length(d)=n) then
writeln(d)
else for i:=1 to n do
begin
str(i,tmp);
haha(d+tmp);
end;
end;

Answer 1

Converts a number to string.
Google: pascal str
:)

Answer 2

How the output from str (234,34)?