Pascal Labels

[Johan Gielen]

Ok, I'm quite new with Pascal. I had some basic Pascal lessons in school, but I want to learn more about it. One thing I don't get the hang of is the use of labels. I just don't know how I should insert them into my progs. and how to use the GOTO command with them.

[aym]

program labeltest;
label 100;
var
i , n : integer;
x : real;
begin
readln(n);
for i := 1 to n do
    begin
    readln(x);
    if ( x < 0) then
        goto 100;
    writeln( sqr(x) );
    end;
100:
end.

This is an example, if you don't understand it, post and I'll explain.