How put a variable in a link

Question

i have this link and this variable:

var fin = \"SAT000000002574\";
\"http://sat3.altervista.org/index.php?id=\'+fin\'\"

I don\'t know how i hav

Answer 1

youre mixing double quotes with single quotes

 "http://sat3.altervista.org/index.php?id="+fin