フィボナッチ数列を出力するJavaScript
<script type="text/javascript">
var fib='0\n';
fib+='1\n';
for(var i=0, before=0, tmp, after=1; i<50;i++){
fib+=(before+after)+'\n';
tmp=after;
after+=before;
before=tmp;
}
document.writeln(fib);
</script>